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Unified Diff: third_party/cld/bar/toolbar/cld/i18n/encodings/compact_lang_det/compact_lang_det_impl.cc

Issue 122007: [chromium-reviews] Add Compact Language Detection (CLD) library to Chrome. This works in Windows... (Closed) Base URL: svn://chrome-svn/chrome/trunk/src/
Patch Set: '' Created 11 years, 6 months ago
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Index: third_party/cld/bar/toolbar/cld/i18n/encodings/compact_lang_det/compact_lang_det_impl.cc
===================================================================
--- third_party/cld/bar/toolbar/cld/i18n/encodings/compact_lang_det/compact_lang_det_impl.cc (revision 0)
+++ third_party/cld/bar/toolbar/cld/i18n/encodings/compact_lang_det/compact_lang_det_impl.cc (revision 0)
@@ -0,0 +1,2506 @@
+// Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <stdio.h>
+#include <string.h>
+#include <string>
+
+#include "third_party/cld/bar/toolbar/cld/i18n/encodings/lang_enc.h"
+
+#include "third_party/cld/bar/toolbar/cld/i18n/encodings/compact_lang_det/compact_lang_det_impl.h"
+#include "third_party/cld/bar/toolbar/cld/i18n/encodings/compact_lang_det/getonescriptspan.h"
+#include "third_party/cld/bar/toolbar/cld/i18n/encodings/compact_lang_det/letterscript_enum.h"
+#include "third_party/cld/bar/toolbar/cld/i18n/encodings/compact_lang_det/tote.h"
+#include "third_party/cld/bar/toolbar/cld/i18n/encodings/compact_lang_det/utf8propjustletter.h"
+#include "third_party/cld/bar/toolbar/cld/i18n/encodings/compact_lang_det/utf8propletterscriptnum.h"
+#include "third_party/cld/bar/toolbar/cld/i18n/encodings/compact_lang_det/utf8scannotjustletterspecial.h"
+
+#include "third_party/cld/bar/toolbar/cld/i18n/encodings/compact_lang_det/cldutil_dbg.h"
+
+#include "third_party/cld/bar/toolbar/cld/i18n/encodings/compact_lang_det/win/cld_basictypes.h"
+#include "third_party/cld/bar/toolbar/cld/i18n/encodings/compact_lang_det/win/cld_commandlineflags.h"
+#include "third_party/cld/bar/toolbar/cld/i18n/encodings/compact_lang_det/win/cld_google.h"
+#include "third_party/cld/bar/toolbar/cld/i18n/encodings/compact_lang_det/win/cld_utf8statetable.h"
+
+// Linker supplies the right tables
+extern UTF8PropObj compact_lang_det_generated_ctjkvz_b1_obj;
+extern const cld::CLDTableSummary kCjkBiTable_obj;
+extern cld::CLDTableSummary kQuadTable_obj;
+extern const cld::CLDTableSummary kLongWord8Table_obj;
+
+DEFINE_bool(cld_html, false, "Print language spans in HTML on stderr");
+DEFINE_bool(cld_forcewords, false, "Score all words, in addition to quads");
+
+DEFINE_bool(cld_showme, false, "Put squeeze/repeat points into HTML text");
+DEFINE_bool(cld_echotext, false, "Print each scriptspan to stderr");
+DEFINE_int32(cld_textlimit, 160, "Examine only initial n KB of actual text");
+// 20 quadgrams is about 80 bytes or about 12 words in real text
+DEFINE_int32(cld_smoothwidth, 20, "Smoothing window width in quadgrams");
+
+
+static const int kLangHintInitial = 12; // Boost language by N initially
+static const int kLangHintBoost = 12; // Boost language by N/16 per quadgram
+
+static const int kShortSpanThresh = 32; // Bytes
+static const int kMaxSecondChanceLen = 1024; // Look at first 1K of short spans
+
+static const int kCheapSqueezeTestThresh = 4096; // Only look for squeezing
+ // after this many text bytes
+static const int kCheapSqueezeTestLen = 256; // Bytes to test to trigger sqz
+static const int kSpacesTriggerPercent = 25; // Trigger sqz if >=25% spaces
+static const int kPredictTriggerPercent = 67; // Trigger sqz if >=67% predicted
+
+static const int kChunksizeDefault = 48; // Squeeze 48-byte chunks
+static const int kSpacesThreshPercent = 25; // Squeeze if >=25% spaces
+static const int kPredictThreshPercent = 40; // Squeeze if >=40% predicted
+
+static const int kMaxSpaceScan = 32; // Bytes
+
+static const int kGoodLang1Percent = 70;
+static const int kGoodLang1and2Percent = 93;
+static const int kShortTextThresh = 256; // Bytes
+
+static const int kMinChunkSizeQuads = 4; // Chunk is at least four quads
+static const int kMaxChunkSizeQuads = 1024; // Chunk is at most 1K quads
+
+static const int kDefaultWordSpan = 256; // Scan at least this many initial
+ // bytes with word scoring
+static const int kReallyBigWordSpan = 9999999; // Forces word scoring all text
+
+static const int kMinReliableSeq = 50; // Record in seq if >= 50% reliable
+
+static const int kPredictionTableSize = 4096; // Must be exactly 4096 for
+ // cheap compressor
+
+// Three packed language probs, subscripted by Encoding
+static const uint32 kEncodingHintProbs[] = {
+ 0x00000000, // ASCII
+ 0x18120cd5, // Latin2 POLISH.11 CZECH.5 HUNGARIAN.3
+ 0x1d3a4bc9, // Latin3 AZERBAIJANI.10 BASQUE.3 CROATIAN.1
+ 0x030819d4, // Latin4 ESTONIAN.11 ITALIAN.4 DUTCH.2
+ 0x00000000, // ISO-8859-5
+ 0x00003742, // Arabic ARABIC.12
+ 0x00000000, // Greek
+ 0x00000742, // Hebrew HEBREW.12
+ 0x00002242, // Latin5 TURKISH.12
+ 0x060419c9, // Latin6 ESTONIAN.10 FINNISH.3 GERMAN.1
+ 0x00000942, // EUC-JP Japanese.12
+ 0x00000942, // SJS Japanese.12
+ 0x00000942, // JIS Japanese.12
+ 0x00004642, // BIG5 ChineseT.12
+ 0x00001142, // GB Chinese.12
+ 0x46295fcd, // EUC-CN UIGHUR.10 MALAY.6 ChineseT.5
+ 0x00000a42, // KSC Korean.12
+ 0x00000000, // Unicode
+ 0x03104674, // EUC ChineseT.9 SWEDISH.8 DUTCH.3
+ 0x00000000, // CNS
+ 0x0f1146c3, // BIG5-CP950 ChineseT.9 Chinese.5 SPANISH.4
+ 0x00000942, // CP932 Japanese.12
+ 0x00000000, // UTF8
+ 0x00000000, // Unknown
+ 0x00000000, // ASCII-7-bit
+ 0x00000000, // KOI8R
+ 0x00000000, // CP1251
+ 0x00000000, // CP1252
+ 0x00000000, // KOI8U
+ 0x451d12cd, // CP1250 CZECH.10 CROATIAN.6 SLOVAK.5
+ 0x0d06052a, // ISO-8859-15 FRENCH.9 GERMAN.8 PORTUGUESE.7
+ 0x00002242, // CP1254 TURKISH.12
+ 0x191516be, // CP1257 LITHUANIAN.8 LATVIAN.7 ESTONIAN.7
+ 0x08003642, // ISO-8859-11 THAI.12 ITALIAN.1
+ 0x00000000, // CP874
+ 0x00003742, // CP1256 ARABIC.12
+ 0x00000742, // CP1255 HEBREW.12
+ 0x00000000, // ISO-8859-8-I
+ 0x00000000, // VISUAL
+ 0x00000000, // CP852
+ 0x39001242, // CSN_369103 CZECH.12 ESPERANTO.1
+ 0x00000000, // CP1253
+ 0x00000000, // CP866
+ 0x2e001944, // ISO-8859-13 ESTONIAN.12 ALBANIAN.3
+ 0x08090a74, // ISO-2022-KR Korean.9 Japanese.8 ITALIAN.3
+ 0x00001142, // GBK Chinese.12
+ 0x4600113d, // GB18030 Chinese.11 ChineseT.7
+ 0x00004642, // BIG5_HKSCS ChineseT.12
+ 0x00000000, // ISO_2022_CN
+ 0x00000000, // TSCII
+ 0x00000000, // TAM
+ 0x00000000, // TAB
+ 0x00000000, // JAGRAN
+ 0x00000000, // MACINTOSH
+ 0x00000000, // UTF7
+ 0x00000000, // BHASKAR
+ 0x00000000, // HTCHANAKYA
+ 0x090646ca, // UTF-16BE ChineseT.10 GERMAN.4 Japanese.2
+ 0x00000000, // UTF-16LE
+ 0x00000000, // UTF-32BE
+ 0x00000000, // UTF-32LE
+ 0x00000000, // X-BINARYENC
+ 0x06001142, // HZ-GB-2312 Chinese.12 GERMAN.1
+ 0x461109c2, // X-UTF8UTF8 Japanese.9 Chinese.5 ChineseT.3
+ 0x00000000, // X-TAM-ELANGO
+ 0x00000000, // X-TAM-LTTMBARANI
+ 0x00000000, // X-TAM-SHREE
+ 0x00000000, // X-TAM-TBOOMIS
+ 0x00000000, // X-TAM-TMNEWS
+ 0x00000000, // X-TAM-WEBTAMIL
+ 0x00000000, // X-KDDI-Shift_JIS
+ 0x00000000, // X-DoCoMo-Shift_JIS
+ 0x00000000, // X-SoftBank-Shift_JIS
+ 0x00000000, // X-KDDI-ISO-2022-JP
+ 0x00000000, // X-SoftBank-ISO-2022-JP
+};
+
+COMPILE_ASSERT(arraysize(kEncodingHintProbs) == NUM_ENCODINGS,
+ kEncodingHintProbs_has_incorrect_size);
+
+// Three packed language probs, subscripted by (anchor) language
+static const uint32 kLanguageHintProbs[] = {
+ 0x00000000, // ENGLISH
+ 0x00000242, // DANISH DANISH.12
+ 0x00000342, // DUTCH DUTCH.12
+ 0x00000442, // FINNISH FINNISH.12
+ 0x00000542, // FRENCH FRENCH.12
+ 0x00000642, // GERMAN GERMAN.12
+ 0x00000742, // HEBREW HEBREW.12
+ 0x00000842, // ITALIAN ITALIAN.12
+ 0x00000942, // Japanese Japanese.12
+ 0x00000a42, // Korean Korean.12
+ 0x51000b43, // NORWEGIAN NORWEGIAN.12 NORWEGIAN_N.2
+ 0x00000c42, // POLISH POLISH.12
+ 0x00000d42, // PORTUGUESE PORTUGUESE.12
+ 0x00000000, // RUSSIAN
+ 0x00000f42, // SPANISH SPANISH.12
+ 0x00001042, // SWEDISH SWEDISH.12
+ 0x00001142, // Chinese Chinese.12
+ 0x00001242, // CZECH CZECH.12
+ 0x00000000, // GREEK
+ 0x47001442, // ICELANDIC ICELANDIC.12 FAROESE.1
+ 0x00001542, // LATVIAN LATVIAN.12
+ 0x00001642, // LITHUANIAN LITHUANIAN.12
+ 0x00001742, // ROMANIAN ROMANIAN.12
+ 0x00001842, // HUNGARIAN HUNGARIAN.12
+ 0x00001942, // ESTONIAN ESTONIAN.12
+ 0x00000000, // TG_UNKNOWN_LANGUAGE
+ 0x00000000, // Unknown
+ 0x00001c42, // BULGARIAN BULGARIAN.12
+ 0x00001d42, // CROATIAN CROATIAN.12
+ 0x1e001d46, // SERBIAN CROATIAN.12 SERBIAN.5
+ 0x00000000, // IRISH
+ 0x0f00203d, // GALICIAN GALICIAN.11 SPANISH.7
+ 0x5e00213a, // TAGALOG TAGALOG.11 SOMALI.4
+ 0x00002242, // TURKISH TURKISH.12
+ 0x00002342, // UKRAINIAN UKRAINIAN.12
+ 0x00000000, // HINDI
+ 0x1c1e25d4, // MACEDONIAN MACEDONIAN.11 SERBIAN.4 BULGARIAN.2
+ 0x00002642, // BENGALI BENGALI.12
+ 0x00002742, // INDONESIAN INDONESIAN.12
+ 0x00000000, // LATIN
+ 0x2700293c, // MALAY MALAY.11 INDONESIAN.6
+ 0x00000000, // MALAYALAM
+ 0x00000000, // WELSH
+ 0x00000000, // NEPALI
+ 0x00000000, // TELUGU
+ 0x00002e42, // ALBANIAN ALBANIAN.12
+ 0x00000000, // TAMIL
+ 0x00003042, // BELARUSIAN BELARUSIAN.12
+ 0x00000000, // JAVANESE
+ 0x00000000, // OCCITAN
+ 0x375f3330, // URDU URDU.10 UIGHUR.7 ARABIC.4
+ 0x41003436, // BIHARI BIHARI.10 MARATHI.10
+ 0x00000000, // GUJARATI
+ 0x0a4636b2, // THAI THAI.7 ChineseT.3 Korean.2
+ 0x00003742, // ARABIC ARABIC.12
+ 0x00003842, // CATALAN CATALAN.12
+ 0x00003942, // ESPERANTO ESPERANTO.12
+ 0x00003a42, // BASQUE BASQUE.12
+ 0x00000000, // INTERLINGUA
+ 0x00000000, // KANNADA
+ 0x05060cca, // PUNJABI POLISH.10 GERMAN.4 FRENCH.2
+ 0x00000000, // SCOTS_GAELIC
+ 0x00003f42, // SWAHILI SWAHILI.12
+ 0x00004042, // SLOVENIAN SLOVENIAN.12
+ 0x00004142, // MARATHI MARATHI.12
+ 0x00004242, // MALTESE MALTESE.12
+ 0x00004342, // VIETNAMESE VIETNAMESE.12
+ 0x00000000, // FRISIAN
+ 0x12004543, // SLOVAK SLOVAK.12 CZECH.2
+ 0x00004642, // ChineseT ChineseT.12
+ 0x00000000, // FAROESE
+ 0x00000000, // SUNDANESE
+ 0x79004944, // UZBEK UZBEK.12 TAJIK.3
+ 0x4d004a46, // AMHARIC AMHARIC.12 TIGRINYA.5
+ 0x00004b42, // AZERBAIJANI AZERBAIJANI.12
+ 0x00000000, // GEORGIAN
+ 0x00000000, // TIGRINYA
+ 0x00004e42, // PERSIAN PERSIAN.12
+ 0x00000000, // BOSNIAN
+ 0x00000000, // SINHALESE
+ 0x00000000, // NORWEGIAN_N
+ 0x00000000, // PORTUGUESE_P
+ 0x00000000, // PORTUGUESE_B
+ 0x00000000, // XHOSA
+ 0x00000000, // ZULU
+ 0x00000000, // GUARANI
+ 0x00000000, // SESOTHO
+ 0x00000000, // TURKMEN
+ 0x7a005933, // KYRGYZ KYRGYZ.10 TATAR.7
+ 0x00000000, // BRETON
+ 0x00000000, // TWI
+ 0x00000000, // YIDDISH
+ 0x00000000, // SERBO_CROATIAN
+ 0x00000000, // SOMALI
+ 0x00005f42, // UIGHUR UIGHUR.12
+ 0x00006042, // KURDISH KURDISH.12
+ 0x00006142, // MONGOLIAN MONGOLIAN.12
+ 0x051130c9, // ARMENIAN BELARUSIAN.10 Chinese.3 FRENCH.1
+ 0x020f0521, // LAOTHIAN FRENCH.8 SPANISH.7 DANISH.6
+ 0x64004e35, // SINDHI PERSIAN.10 SINDHI.9
+ 0x00000000, // RHAETO_ROMANCE
+ 0x00006642, // AFRIKAANS AFRIKAANS.12
+ 0x00000000, // LUXEMBOURGISH
+ 0x00006842, // BURMESE BURMESE.12
+ 0x00002242, // KHMER TURKISH.12
+ 0x88006a3c, // TIBETAN TIBETAN.11 DZONGKHA.6
+ 0x00000000, // DHIVEHI
+ 0x00000000, // CHEROKEE
+ 0x00000000, // SYRIAC
+ 0x00000000, // LIMBU
+ 0x00000000, // ORIYA
+ 0x00000000, // ASSAMESE
+ 0x00000000, // CORSICAN
+ 0x00000000, // INTERLINGUE
+ 0x00007342, // KAZAKH KAZAKH.12
+ 0x00000000, // LINGALA
+ 0x00000000, // MOLDAVIAN
+ 0x5f007645, // PASHTO PASHTO.12 UIGHUR.4
+ 0x00000000, // QUECHUA
+ 0x00000000, // SHONA
+ 0x00007942, // TAJIK TAJIK.12
+ 0x00000000, // TATAR
+ 0x00000000, // TONGA
+ 0x00000000, // YORUBA
+ 0x00000000, // CREOLES_AND_PIDGINS_ENGLISH_BASED
+ 0x00000000, // CREOLES_AND_PIDGINS_FRENCH_BASED
+ 0x00000000, // CREOLES_AND_PIDGINS_PORTUGUESE_BASED
+ 0x00000000, // CREOLES_AND_PIDGINS_OTHER
+ 0x00000000, // MAORI
+ 0x00000000, // WOLOF
+ 0x00000000, // ABKHAZIAN
+ 0x00000000, // AFAR
+ 0x00000000, // AYMARA
+ 0x00000000, // BASHKIR
+ 0x00000000, // BISLAMA
+ 0x00000000, // DZONGKHA
+ 0x00000000, // FIJIAN
+ 0x00000000, // GREENLANDIC
+ 0x00000000, // HAUSA
+ 0x00000000, // HAITIAN_CREOLE
+ 0x00000000, // INUPIAK
+ 0x00000542, // INUKTITUT FRENCH.12
+ 0x00000000, // KASHMIRI
+ 0x00000000, // KINYARWANDA
+ 0x00000000, // MALAGASY
+ 0x00000000, // NAURU
+ 0x00000000, // OROMO
+ 0x00000000, // RUNDI
+ 0x00000000, // SAMOAN
+ 0x00000000, // SANGO
+ 0x344197d3, // SANSKRIT SANSKRIT.11 MARATHI.4 BIHARI.1
+ 0x00000000, // SISWANT
+ 0x00000000, // TSONGA
+ 0x00000000, // TSWANA
+ 0x00000000, // VOLAPUK
+ 0x00000000, // ZHUANG
+ 0x00000000, // KHASI
+ 0x00000000, // SCOTS
+ 0x00000000, // GANDA
+ 0x00000000, // MANX
+ 0x00000000, // MONTENEGRIN
+ // Add new language hints just before here (just use 0x00000000)
+};
+
+COMPILE_ASSERT(arraysize(kLanguageHintProbs) == NUM_LANGUAGES,
+ kLanguageHintProbs_has_incorrect_size);
+
+typedef struct {
+ char key[4];
+ uint32 probs;
+} HintEntry;
+
+
+// Massaged TLD, followed by three packed language probs
+static const int kTLDHintProbsSize = 201;
+static const HintEntry kTLDHintProbs[kTLDHintProbsSize] = { // MaxRange 12
+ {{0x61,0x63,0x5f,0x5f}, 0x0a000945}, // ac__ Japanese.12 Korean.4
+ {{0x61,0x64,0x5f,0x5f}, 0x00003842}, // ad__ CATALAN.12
+ {{0x61,0x65,0x5f,0x5f}, 0x00003742}, // ae__ ARABIC.12
+ {{0x61,0x66,0x5f,0x5f}, 0x4e00763d}, // af__ PASHTO.11 PERSIAN.7
+ {{0x61,0x67,0x5f,0x5f}, 0x09000643}, // ag__ GERMAN.12 Japanese.2
+ {{0x61,0x69,0x5f,0x5f}, 0x0c180938}, // ai__ Japanese.11 HUNGARIAN.7 POLISH.2
+ {{0x61,0x6c,0x5f,0x5f}, 0x00002e42}, // al__ ALBANIAN.12
+ {{0x61,0x6e,0x5f,0x5f}, 0x6e00033d}, // an__ DUTCH.11 LIMBU.7
+ {{0x61,0x6f,0x5f,0x5f}, 0x05000d42}, // ao__ PORTUGUESE.12 FRENCH.1
+ {{0x61,0x71,0x5f,0x5f}, 0x05000f29}, // aq__ SPANISH.9 FRENCH.6
+ {{0x61,0x72,0x5f,0x5f}, 0x00000f42}, // ar__ SPANISH.12
+ {{0x61,0x73,0x5f,0x5f}, 0x0f120bcd}, // as__ NORWEGIAN.10 CZECH.6 SPANISH.5
+ {{0x61,0x74,0x5f,0x5f}, 0x00000642}, // at__ GERMAN.12
+ {{0x61,0x77,0x5f,0x5f}, 0x0f000345}, // aw__ DUTCH.12 SPANISH.4
+ {{0x61,0x78,0x5f,0x5f}, 0x00001042}, // ax__ SWEDISH.12
+ {{0x61,0x7a,0x5f,0x5f}, 0x00004b42}, // az__ AZERBAIJANI.12
+ {{0x62,0x61,0x5f,0x5f}, 0x00001d42}, // ba__ CROATIAN.12
+ {{0x62,0x62,0x5f,0x5f}, 0x00002842}, // bb__ LATIN.12
+ {{0x62,0x64,0x5f,0x5f}, 0x00002642}, // bd__ BENGALI.12
+ {{0x62,0x65,0x5f,0x5f}, 0x05000335}, // be__ DUTCH.10 FRENCH.9
+ {{0x62,0x66,0x5f,0x5f}, 0x00000542}, // bf__ FRENCH.12
+ {{0x62,0x67,0x5f,0x5f}, 0x00001c42}, // bg__ BULGARIAN.12
+ {{0x62,0x68,0x5f,0x5f}, 0x00003742}, // bh__ ARABIC.12
+ {{0x62,0x69,0x5f,0x5f}, 0x0f00053f}, // bi__ FRENCH.11 SPANISH.9
+ {{0x62,0x6a,0x5f,0x5f}, 0x00000542}, // bj__ FRENCH.12
+ {{0x62,0x6d,0x5f,0x5f}, 0x98043929}, // bm__ ESPERANTO.9 FINNISH.8 SISWANT.6
+ {{0x62,0x6e,0x5f,0x5f}, 0x00002942}, // bn__ MALAY.12
+ {{0x62,0x6f,0x5f,0x5f}, 0x00000f42}, // bo__ SPANISH.12
+ {{0x62,0x72,0x5f,0x5f}, 0x00000d42}, // br__ PORTUGUESE.12
+ {{0x62,0x74,0x5f,0x5f}, 0x00008842}, // bt__ DZONGKHA.12
+ {{0x62,0x77,0x5f,0x5f}, 0x06059ac4}, // bw__ TSWANA.9 FRENCH.6 GERMAN.5
+ {{0x62,0x79,0x5f,0x5f}, 0x00003024}, // by__ BELARUSIAN.9
+ {{0x62,0x7a,0x5f,0x5f}, 0x0f0a0924}, // bz__ Japanese.9 Korean.5 SPANISH.1
+ {{0x63,0x61,0x5f,0x5f}, 0x00000542}, // ca__ FRENCH.12
+ {{0x63,0x61,0x74,0x5f}, 0x00003842}, // cat_ CATALAN.12
+ {{0x63,0x64,0x5f,0x5f}, 0x06051224}, // cd__ CZECH.9 FRENCH.5 GERMAN.1
+ {{0x63,0x66,0x5f,0x5f}, 0x00000542}, // cf__ FRENCH.12
+ {{0x63,0x67,0x5f,0x5f}, 0x00000542}, // cg__ FRENCH.12
+ {{0x63,0x68,0x5f,0x5f}, 0x08050638}, // ch__ GERMAN.11 FRENCH.7 ITALIAN.2
+ {{0x63,0x69,0x5f,0x5f}, 0x00000542}, // ci__ FRENCH.12
+ {{0x63,0x6c,0x5f,0x5f}, 0x00000f42}, // cl__ SPANISH.12
+ {{0x63,0x6d,0x5f,0x5f}, 0x00000542}, // cm__ FRENCH.12
+ {{0x63,0x6e,0x5f,0x5f}, 0x00001142}, // cn__ Chinese.12
+ {{0x63,0x6f,0x5f,0x5f}, 0x00000f42}, // co__ SPANISH.12
+// {{0x63,0x6f,0x6f,0x70}, 0x0f0509cd}, // coop Japanese.10 FRENCH.6 SPANISH.5
+ {{0x63,0x72,0x5f,0x5f}, 0x00000f42}, // cr__ SPANISH.12
+ {{0x63,0x75,0x5f,0x5f}, 0x00000f42}, // cu__ SPANISH.12
+ {{0x63,0x76,0x5f,0x5f}, 0x00000d42}, // cv__ PORTUGUESE.12
+ {{0x63,0x78,0x5f,0x5f}, 0x223a091f}, // cx__ Japanese.8 BASQUE.6 TURKISH.4
+ {{0x63,0x79,0x5f,0x5f}, 0x150622ba}, // cy__ TURKISH.8 GERMAN.4 LATVIAN.3
+ {{0x63,0x7a,0x5f,0x5f}, 0x00001242}, // cz__ CZECH.12
+ {{0x64,0x65,0x5f,0x5f}, 0x00000642}, // de__ GERMAN.12
+ {{0x64,0x6b,0x5f,0x5f}, 0x00000242}, // dk__ DANISH.12
+ {{0x64,0x6f,0x5f,0x5f}, 0x21000f42}, // do__ SPANISH.12 TAGALOG.1
+ {{0x64,0x7a,0x5f,0x5f}, 0x37000535}, // dz__ FRENCH.10 ARABIC.9
+ {{0x65,0x63,0x5f,0x5f}, 0x00000f42}, // ec__ SPANISH.12
+// {{0x65,0x64,0x75,0x5f}, 0x2e0f3873}, // edu_ CATALAN.9 SPANISH.7 ALBANIAN.2
+ {{0x65,0x65,0x5f,0x5f}, 0x00001942}, // ee__ ESTONIAN.12
+ {{0x65,0x67,0x5f,0x5f}, 0x05003742}, // eg__ ARABIC.12 FRENCH.1
+ {{0x65,0x72,0x5f,0x5f}, 0x00000b42}, // er__ NORWEGIAN.12
+ {{0x65,0x73,0x5f,0x5f}, 0x38200fd4}, // es__ SPANISH.11 GALICIAN.4 CATALAN.2
+ {{0x65,0x74,0x5f,0x5f}, 0x39004a39}, // et__ AMHARIC.11 ESPERANTO.3
+ {{0x66,0x69,0x5f,0x5f}, 0x10000444}, // fi__ FINNISH.12 SWEDISH.3
+ {{0x66,0x6a,0x5f,0x5f}, 0x050489e0}, // fj__ FIJIAN.12 FINNISH.5 FRENCH.3
+ {{0x66,0x6f,0x5f,0x5f}, 0x00004742}, // fo__ FAROESE.12
+ {{0x66,0x72,0x5f,0x5f}, 0x00000542}, // fr__ FRENCH.12
+ {{0x67,0x61,0x5f,0x5f}, 0x00000542}, // ga__ FRENCH.12
+ {{0x67,0x64,0x5f,0x5f}, 0x061d05d5}, // gd__ FRENCH.11 CROATIAN.5 GERMAN.3
+ {{0x67,0x65,0x5f,0x5f}, 0x00004c2d}, // ge__ GEORGIAN.10
+ {{0x67,0x66,0x5f,0x5f}, 0x00000542}, // gf__ FRENCH.12
+ {{0x67,0x67,0x5f,0x5f}, 0x06002244}, // gg__ TURKISH.12 GERMAN.3
+ {{0x67,0x68,0x5f,0x5f}, 0x05000436}, // gh__ FINNISH.10 FRENCH.10
+ {{0x67,0x69,0x5f,0x5f}, 0x0f0538ce}, // gi__ CATALAN.10 FRENCH.7 SPANISH.6
+ {{0x67,0x6c,0x5f,0x5f}, 0x398a0238}, // gl__ DANISH.11 GREENLANDIC.7 ESPERANTO.2
+ {{0x67,0x6d,0x5f,0x5f}, 0x0600043e}, // gm__ FINNISH.11 GERMAN.8
+ {{0x67,0x6e,0x5f,0x5f}, 0x00000542}, // gn__ FRENCH.12
+// {{0x67,0x6f,0x76,0x5f}, 0x05000f25}, // gov_ SPANISH.9 FRENCH.2
+ {{0x67,0x70,0x5f,0x5f}, 0x00000542}, // gp__ FRENCH.12
+ {{0x67,0x71,0x5f,0x5f}, 0x0f000547}, // gq__ FRENCH.12 SPANISH.6
+ {{0x67,0x73,0x5f,0x5f}, 0x00000942}, // gs__ Japanese.12
+ {{0x67,0x74,0x5f,0x5f}, 0x00000f42}, // gt__ SPANISH.12
+ {{0x68,0x6b,0x5f,0x5f}, 0x11004643}, // hk__ ChineseT.12 Chinese.2
+ {{0x68,0x6d,0x5f,0x5f}, 0x4606092e}, // hm__ Japanese.10 GERMAN.6 ChineseT.2
+ {{0x68,0x6e,0x5f,0x5f}, 0x00000f42}, // hn__ SPANISH.12
+ {{0x68,0x72,0x5f,0x5f}, 0x00001d42}, // hr__ CROATIAN.12
+ {{0x68,0x74,0x5f,0x5f}, 0x0f000542}, // ht__ FRENCH.12 SPANISH.1
+ {{0x68,0x75,0x5f,0x5f}, 0x00001842}, // hu__ HUNGARIAN.12
+ {{0x69,0x64,0x5f,0x5f}, 0x00002742}, // id__ INDONESIAN.12
+ {{0x69,0x65,0x5f,0x5f}, 0x050c1f24}, // ie__ IRISH.9 POLISH.5 FRENCH.1
+ {{0x69,0x6c,0x5f,0x5f}, 0x00000742}, // il__ HEBREW.12
+ {{0x69,0x6e,0x74,0x5f}, 0x0f060574}, // int_ FRENCH.9 GERMAN.8 SPANISH.3
+ {{0x69,0x6f,0x5f,0x5f}, 0x11090fd5}, // io__ SPANISH.11 Japanese.5 Chinese.3
+ {{0x69,0x71,0x5f,0x5f}, 0x60003744}, // iq__ ARABIC.12 KURDISH.3
+ {{0x69,0x72,0x5f,0x5f}, 0x00004e42}, // ir__ PERSIAN.12
+ {{0x69,0x73,0x5f,0x5f}, 0x00001442}, // is__ ICELANDIC.12
+ {{0x69,0x74,0x5f,0x5f}, 0x00000842}, // it__ ITALIAN.12
+ {{0x6a,0x65,0x5f,0x5f}, 0x29050328}, // je__ DUTCH.9 FRENCH.7 MALAY.5
+ {{0x6a,0x6d,0x5f,0x5f}, 0x040f0576}, // jm__ FRENCH.9 SPANISH.8 FINNISH.5
+ {{0x6a,0x6f,0x5f,0x5f}, 0x00003742}, // jo__ ARABIC.12
+// {{0x6a,0x6f,0x62,0x73}, 0x0f060329}, // jobs DUTCH.9 GERMAN.8 SPANISH.6
+ {{0x6a,0x70,0x5f,0x5f}, 0x00000942}, // jp__ Japanese.12
+ {{0x6b,0x65,0x5f,0x5f}, 0x040f3fc3}, // ke__ SWAHILI.9 SPANISH.5 FINNISH.4
+ {{0x6b,0x69,0x5f,0x5f}, 0x04000643}, // ki__ GERMAN.12 FINNISH.2
+ {{0x6b,0x6d,0x5f,0x5f}, 0x00000542}, // km__ FRENCH.12
+ {{0x6b,0x70,0x5f,0x5f}, 0x00000a42}, // kp__ Korean.12
+ {{0x6b,0x72,0x5f,0x5f}, 0x00000a42}, // kr__ Korean.12
+ {{0x6b,0x77,0x5f,0x5f}, 0x00003742}, // kw__ ARABIC.12
+ {{0x6b,0x79,0x5f,0x5f}, 0x0500083f}, // ky__ ITALIAN.11 FRENCH.9
+ {{0x6b,0x7a,0x5f,0x5f}, 0x0000732d}, // kz__ KAZAKH.10
+ {{0x6c,0x62,0x5f,0x5f}, 0x05003747}, // lb__ ARABIC.12 FRENCH.6
+ {{0x6c,0x63,0x5f,0x5f}, 0x09000645}, // lc__ GERMAN.12 Japanese.4
+ {{0x6c,0x69,0x5f,0x5f}, 0x1600063d}, // li__ GERMAN.11 LITHUANIAN.7
+ {{0x6c,0x73,0x5f,0x5f}, 0x00005742}, // ls__ SESOTHO.12
+ {{0x6c,0x74,0x5f,0x5f}, 0x00001642}, // lt__ LITHUANIAN.12
+ {{0x6c,0x75,0x5f,0x5f}, 0x0600053d}, // lu__ FRENCH.11 GERMAN.7
+ {{0x6c,0x76,0x5f,0x5f}, 0x00001542}, // lv__ LATVIAN.12
+ {{0x6c,0x79,0x5f,0x5f}, 0x05003744}, // ly__ ARABIC.12 FRENCH.3
+ {{0x6d,0x61,0x5f,0x5f}, 0x3700053d}, // ma__ FRENCH.11 ARABIC.7
+ {{0x6d,0x63,0x5f,0x5f}, 0x00000542}, // mc__ FRENCH.12
+ {{0x6d,0x64,0x5f,0x5f}, 0x00001724}, // md__ ROMANIAN.9
+ {{0x6d,0x65,0x5f,0x5f}, 0x00001d42}, // me__ CROATIAN.12
+ {{0x6d,0x67,0x5f,0x5f}, 0x00000542}, // mg__ FRENCH.12
+ {{0x6d,0x6b,0x5f,0x5f}, 0x1c002543}, // mk__ MACEDONIAN.12 BULGARIAN.2
+ {{0x6d,0x6c,0x5f,0x5f}, 0x00000542}, // ml__ FRENCH.12
+ {{0x6d,0x6e,0x5f,0x5f}, 0x00006142}, // mn__ MONGOLIAN.12
+ {{0x6d,0x6f,0x5f,0x5f}, 0x110d4631}, // mo__ ChineseT.10 PORTUGUESE.8 Chinese.5
+ {{0x6d,0x71,0x5f,0x5f}, 0x00000542}, // mq__ FRENCH.12
+ {{0x6d,0x72,0x5f,0x5f}, 0x37000535}, // mr__ FRENCH.10 ARABIC.9
+ {{0x6d,0x73,0x5f,0x5f}, 0x090f06d5}, // ms__ GERMAN.11 SPANISH.5 Japanese.3
+ {{0x6d,0x74,0x5f,0x5f}, 0x00004242}, // mt__ MALTESE.12
+ {{0x6d,0x75,0x5f,0x5f}, 0x05000934}, // mu__ Japanese.10 FRENCH.8
+ {{0x6d,0x76,0x5f,0x5f}, 0x28000436}, // mv__ FINNISH.10 LATIN.10
+ {{0x6d,0x77,0x5f,0x5f}, 0x0611092a}, // mw__ Japanese.9 Chinese.8 GERMAN.7
+ {{0x6d,0x78,0x5f,0x5f}, 0x00000f42}, // mx__ SPANISH.12
+ {{0x6d,0x79,0x5f,0x5f}, 0x00002942}, // my__ MALAY.12
+ {{0x6d,0x7a,0x5f,0x5f}, 0x00000d42}, // mz__ PORTUGUESE.12
+ {{0x6e,0x61,0x5f,0x5f}, 0x06006644}, // na__ AFRIKAANS.12 GERMAN.3
+ {{0x6e,0x63,0x5f,0x5f}, 0x00000542}, // nc__ FRENCH.12
+ {{0x6e,0x65,0x5f,0x5f}, 0x8b000542}, // ne__ FRENCH.12 HAUSA.1
+ {{0x6e,0x66,0x5f,0x5f}, 0x00000542}, // nf__ FRENCH.12
+ {{0x6e,0x69,0x5f,0x5f}, 0x00000f42}, // ni__ SPANISH.12
+ {{0x6e,0x6c,0x5f,0x5f}, 0x00000342}, // nl__ DUTCH.12
+ {{0x6e,0x6f,0x5f,0x5f}, 0x51000b43}, // no__ NORWEGIAN.12 NORWEGIAN_N.2
+ {{0x6e,0x75,0x5f,0x5f}, 0x0300103b}, // nu__ SWEDISH.11 DUTCH.5
+ {{0x6f,0x6d,0x5f,0x5f}, 0x00003742}, // om__ ARABIC.12
+ {{0x70,0x61,0x5f,0x5f}, 0x00000f42}, // pa__ SPANISH.12
+ {{0x70,0x65,0x5f,0x5f}, 0x00000f42}, // pe__ SPANISH.12
+ {{0x70,0x66,0x5f,0x5f}, 0x00000542}, // pf__ FRENCH.12
+ {{0x70,0x67,0x5f,0x5f}, 0x00000f24}, // pg__ SPANISH.9
+ {{0x70,0x68,0x5f,0x5f}, 0x00002142}, // ph__ TAGALOG.12
+ {{0x70,0x6b,0x5f,0x5f}, 0x00003342}, // pk__ URDU.12
+ {{0x70,0x6c,0x5f,0x5f}, 0x30000c42}, // pl__ POLISH.12 BELARUSIAN.1
+ {{0x70,0x6e,0x5f,0x5f}, 0x04000644}, // pn__ GERMAN.12 FINNISH.3
+ {{0x70,0x72,0x5f,0x5f}, 0x00000f42}, // pr__ SPANISH.12
+ {{0x70,0x72,0x6f,0x5f}, 0x46050fd5}, // pro_ SPANISH.11 FRENCH.5 ChineseT.3
+ {{0x70,0x73,0x5f,0x5f}, 0x00003742}, // ps__ ARABIC.12
+ {{0x70,0x74,0x5f,0x5f}, 0x00000d42}, // pt__ PORTUGUESE.12
+ {{0x70,0x79,0x5f,0x5f}, 0x00000f42}, // py__ SPANISH.12
+ {{0x71,0x61,0x5f,0x5f}, 0x00003742}, // qa__ ARABIC.12
+ {{0x72,0x65,0x5f,0x5f}, 0x00000542}, // re__ FRENCH.12
+ {{0x72,0x6f,0x5f,0x5f}, 0x00001742}, // ro__ ROMANIAN.12
+ {{0x72,0x73,0x5f,0x5f}, 0x00001d42}, // rs__ CROATIAN.12
+ {{0x72,0x77,0x5f,0x5f}, 0x9000053e}, // rw__ FRENCH.11 KINYARWANDA.8
+ {{0x73,0x61,0x5f,0x5f}, 0x00003742}, // sa__ ARABIC.12
+ {{0x73,0x62,0x5f,0x5f}, 0x00000442}, // sb__ FINNISH.12
+ {{0x73,0x63,0x5f,0x5f}, 0x060f092f}, // sc__ Japanese.10 SPANISH.7 GERMAN.3
+ {{0x73,0x64,0x5f,0x5f}, 0x00003742}, // sd__ ARABIC.12
+ {{0x73,0x65,0x5f,0x5f}, 0x00001042}, // se__ SWEDISH.12
+ {{0x73,0x69,0x5f,0x5f}, 0x00004042}, // si__ SLOVENIAN.12
+ {{0x73,0x6b,0x5f,0x5f}, 0x12004543}, // sk__ SLOVAK.12 CZECH.2
+ {{0x73,0x6d,0x5f,0x5f}, 0x00000842}, // sm__ ITALIAN.12
+ {{0x73,0x6e,0x5f,0x5f}, 0x00000542}, // sn__ FRENCH.12
+ {{0x73,0x72,0x5f,0x5f}, 0x03001e44}, // sr__ SERBIAN.12 DUTCH.3
+ {{0x73,0x76,0x5f,0x5f}, 0x00000f42}, // sv__ SPANISH.12
+ {{0x73,0x79,0x5f,0x5f}, 0x00003742}, // sy__ ARABIC.12
+ {{0x74,0x63,0x5f,0x5f}, 0x0a2206cd}, // tc__ GERMAN.10 TURKISH.6 Korean.5
+ {{0x74,0x66,0x5f,0x5f}, 0x00000642}, // tf__ GERMAN.12
+ {{0x74,0x67,0x5f,0x5f}, 0x00000542}, // tg__ FRENCH.12
+ {{0x74,0x68,0x5f,0x5f}, 0x9e0936c9}, // th__ THAI.10 Japanese.3 SCOTS.1
+ {{0x74,0x6a,0x5f,0x5f}, 0x00007924}, // tj__ TAJIK.9
+ {{0x74,0x6c,0x5f,0x5f}, 0x060f0dcd}, // tl__ PORTUGUESE.10 SPANISH.6 GERMAN.5
+ {{0x74,0x6e,0x5f,0x5f}, 0x3700053e}, // tn__ FRENCH.11 ARABIC.8
+ {{0x74,0x6f,0x5f,0x5f}, 0x064609c5}, // to__ Japanese.9 ChineseT.7 GERMAN.6
+ {{0x74,0x70,0x5f,0x5f}, 0x06000944}, // tp__ Japanese.12 GERMAN.3
+ {{0x74,0x72,0x5f,0x5f}, 0x00002242}, // tr__ TURKISH.12
+ {{0x74,0x72,0x61,0x76}, 0x064509c3}, // trav Japanese.9 SLOVAK.5 GERMAN.4
+ {{0x74,0x74,0x5f,0x5f}, 0x0f00063e}, // tt__ GERMAN.11 SPANISH.8
+ {{0x74,0x77,0x5f,0x5f}, 0x00004642}, // tw__ ChineseT.12
+ {{0x74,0x7a,0x5f,0x5f}, 0x00003f42}, // tz__ SWAHILI.12
+ {{0x75,0x61,0x5f,0x5f}, 0x0000232d}, // ua__ UKRAINIAN.10
+ {{0x75,0x79,0x5f,0x5f}, 0x00000f42}, // uy__ SPANISH.12
+ {{0x75,0x7a,0x5f,0x5f}, 0x0000492d}, // uz__ UZBEK.10
+ {{0x76,0x61,0x5f,0x5f}, 0x060f0828}, // va__ ITALIAN.9 SPANISH.7 GERMAN.5
+ {{0x76,0x63,0x5f,0x5f}, 0x0d000939}, // vc__ Japanese.11 PORTUGUESE.3
+ {{0x76,0x65,0x5f,0x5f}, 0x00000f42}, // ve__ SPANISH.12
+ {{0x76,0x67,0x5f,0x5f}, 0x09000f43}, // vg__ SPANISH.12 Japanese.2
+ {{0x76,0x69,0x5f,0x5f}, 0x00002942}, // vi__ MALAY.12
+ {{0x76,0x6e,0x5f,0x5f}, 0x00004342}, // vn__ VIETNAMESE.12
+ {{0x76,0x75,0x5f,0x5f}, 0x00000642}, // vu__ GERMAN.12
+ {{0x77,0x73,0x5f,0x5f}, 0x4b0f0624}, // ws__ GERMAN.9 SPANISH.5 AZERBAIJANI.1
+ {{0x79,0x65,0x5f,0x5f}, 0x00003742}, // ye__ ARABIC.12
+ {{0x79,0x75,0x5f,0x5f}, 0x1e001d3d}, // yu__ CROATIAN.11 SERBIAN.7
+ {{0x7a,0x61,0x5f,0x5f}, 0x00006642}, // za__ AFRIKAANS.12
+ {{0x7a,0x6d,0x5f,0x5f}, 0x0b000435}, // zm__ FINNISH.10 NORWEGIAN.9
+ {{0x7a,0x77,0x5f,0x5f}, 0x3f00783e}, // zw__ SHONA.11 SWAHILI.8
+};
+
+
+// Statistically closest language, based on quadgram table
+// Those that are far from other languges map to UNKNOWN_LANGUAGE
+// Subscripted by Language
+//
+// From lang_correlation.txt and hand-edits
+// sed 's/^\([^ ]*\) \([^ ]*\) coef=0\.\(..\).*$/
+// (\3 >= kMinCorrPercent) ? \2 : UNKNOWN_LANGUAGE,
+// \/\/ \1/' lang_correlation.txt >/tmp/closest_lang_decl.txt
+//
+static const int kMinCorrPercent = 24; // Pick off how close you want
+ // 24 catches PERSIAN <== ARABIC
+ // but not SPANISH <== PORTUGESE
+static Language Unknown = UNKNOWN_LANGUAGE;
+
+// Subscripted by Language
+static const Language kClosestAltLanguage[] = {
+ (28 >= kMinCorrPercent) ? SCOTS : UNKNOWN_LANGUAGE, // ENGLISH
+ (36 >= kMinCorrPercent) ? NORWEGIAN : UNKNOWN_LANGUAGE, // DANISH
+ (31 >= kMinCorrPercent) ? AFRIKAANS : UNKNOWN_LANGUAGE, // DUTCH
+ (15 >= kMinCorrPercent) ? ESTONIAN : UNKNOWN_LANGUAGE, // FINNISH
+ (11 >= kMinCorrPercent) ? OCCITAN : UNKNOWN_LANGUAGE, // FRENCH
+ (17 >= kMinCorrPercent) ? LUXEMBOURGISH : UNKNOWN_LANGUAGE, // GERMAN
+ (27 >= kMinCorrPercent) ? YIDDISH : UNKNOWN_LANGUAGE, // HEBREW
+ (16 >= kMinCorrPercent) ? CORSICAN : UNKNOWN_LANGUAGE, // ITALIAN
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // Japanese
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // Korean
+ (41 >= kMinCorrPercent) ? NORWEGIAN_N : UNKNOWN_LANGUAGE, // NORWEGIAN
+ ( 5 >= kMinCorrPercent) ? SLOVAK : UNKNOWN_LANGUAGE, // POLISH
+ (23 >= kMinCorrPercent) ? SPANISH : UNKNOWN_LANGUAGE, // PORTUGUESE
+ (33 >= kMinCorrPercent) ? BULGARIAN : UNKNOWN_LANGUAGE, // RUSSIAN
+ (28 >= kMinCorrPercent) ? GALICIAN : UNKNOWN_LANGUAGE, // SPANISH
+ (17 >= kMinCorrPercent) ? NORWEGIAN : UNKNOWN_LANGUAGE, // SWEDISH
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // Chinese
+ (42 >= kMinCorrPercent) ? SLOVAK : UNKNOWN_LANGUAGE, // CZECH
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // GREEK
+ (35 >= kMinCorrPercent) ? FAROESE : UNKNOWN_LANGUAGE, // ICELANDIC
+ ( 7 >= kMinCorrPercent) ? LITHUANIAN : UNKNOWN_LANGUAGE, // LATVIAN
+ ( 7 >= kMinCorrPercent) ? LATVIAN : UNKNOWN_LANGUAGE, // LITHUANIAN
+ ( 4 >= kMinCorrPercent) ? LATIN : UNKNOWN_LANGUAGE, // ROMANIAN
+ ( 4 >= kMinCorrPercent) ? SLOVAK : UNKNOWN_LANGUAGE, // HUNGARIAN
+ (15 >= kMinCorrPercent) ? FINNISH : UNKNOWN_LANGUAGE, // ESTONIAN
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // Ignore
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // Unknown
+ (33 >= kMinCorrPercent) ? RUSSIAN : UNKNOWN_LANGUAGE, // BULGARIAN
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // CROATIAN
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // SERBIAN
+ (24 >= kMinCorrPercent) ? SCOTS_GAELIC : UNKNOWN_LANGUAGE, // IRISH
+ (28 >= kMinCorrPercent) ? SPANISH : UNKNOWN_LANGUAGE, // GALICIAN
+ ( 8 >= kMinCorrPercent) ? INDONESIAN : UNKNOWN_LANGUAGE, // TAGALOG
+ (29 >= kMinCorrPercent) ? AZERBAIJANI : UNKNOWN_LANGUAGE, // TURKISH
+ (28 >= kMinCorrPercent) ? RUSSIAN : UNKNOWN_LANGUAGE, // UKRAINIAN
+ (37 >= kMinCorrPercent) ? MARATHI : UNKNOWN_LANGUAGE, // HINDI
+ (29 >= kMinCorrPercent) ? BULGARIAN : UNKNOWN_LANGUAGE, // MACEDONIAN
+ (14 >= kMinCorrPercent) ? ASSAMESE : UNKNOWN_LANGUAGE, // BENGALI
+ (46 >= kMinCorrPercent) ? MALAY : UNKNOWN_LANGUAGE, // INDONESIAN
+ ( 9 >= kMinCorrPercent) ? INTERLINGUA : UNKNOWN_LANGUAGE, // LATIN
+ (46 >= kMinCorrPercent) ? INDONESIAN : UNKNOWN_LANGUAGE, // MALAY
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // MALAYALAM
+ ( 4 >= kMinCorrPercent) ? BRETON : UNKNOWN_LANGUAGE, // WELSH
+ ( 8 >= kMinCorrPercent) ? HINDI : UNKNOWN_LANGUAGE, // NEPALI
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // TELUGU
+ ( 3 >= kMinCorrPercent) ? ESPERANTO : UNKNOWN_LANGUAGE, // ALBANIAN
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // TAMIL
+ (22 >= kMinCorrPercent) ? UKRAINIAN : UNKNOWN_LANGUAGE, // BELARUSIAN
+ (15 >= kMinCorrPercent) ? SUNDANESE : UNKNOWN_LANGUAGE, // JAVANESE
+ (19 >= kMinCorrPercent) ? CATALAN : UNKNOWN_LANGUAGE, // OCCITAN
+ (27 >= kMinCorrPercent) ? PERSIAN : UNKNOWN_LANGUAGE, // URDU
+ (36 >= kMinCorrPercent) ? HINDI : UNKNOWN_LANGUAGE, // BIHARI
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // GUJARATI
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // THAI
+ (24 >= kMinCorrPercent) ? PERSIAN : UNKNOWN_LANGUAGE, // ARABIC
+ (19 >= kMinCorrPercent) ? OCCITAN : UNKNOWN_LANGUAGE, // CATALAN
+ ( 4 >= kMinCorrPercent) ? LATIN : UNKNOWN_LANGUAGE, // ESPERANTO
+ ( 3 >= kMinCorrPercent) ? GERMAN : UNKNOWN_LANGUAGE, // BASQUE
+ ( 9 >= kMinCorrPercent) ? LATIN : UNKNOWN_LANGUAGE, // INTERLINGUA
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // KANNADA
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // PUNJABI
+ (24 >= kMinCorrPercent) ? IRISH : UNKNOWN_LANGUAGE, // SCOTS_GAELIC
+ ( 7 >= kMinCorrPercent) ? KINYARWANDA : UNKNOWN_LANGUAGE, // SWAHILI
+ (28 >= kMinCorrPercent) ? SERBO_CROATIAN : UNKNOWN_LANGUAGE, // SLOVENIAN
+ (37 >= kMinCorrPercent) ? HINDI : UNKNOWN_LANGUAGE, // MARATHI
+ ( 3 >= kMinCorrPercent) ? ITALIAN : UNKNOWN_LANGUAGE, // MALTESE
+ ( 1 >= kMinCorrPercent) ? YORUBA : UNKNOWN_LANGUAGE, // VIETNAMESE
+ (15 >= kMinCorrPercent) ? DUTCH : UNKNOWN_LANGUAGE, // FRISIAN
+ (42 >= kMinCorrPercent) ? CZECH : UNKNOWN_LANGUAGE, // SLOVAK
+ // Original ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // ChineseT
+ (24 >= kMinCorrPercent) ? CHINESE : UNKNOWN_LANGUAGE, // ChineseT
+ (35 >= kMinCorrPercent) ? ICELANDIC : UNKNOWN_LANGUAGE, // FAROESE
+ (15 >= kMinCorrPercent) ? JAVANESE : UNKNOWN_LANGUAGE, // SUNDANESE
+ (17 >= kMinCorrPercent) ? TAJIK : UNKNOWN_LANGUAGE, // UZBEK
+ ( 7 >= kMinCorrPercent) ? TIGRINYA : UNKNOWN_LANGUAGE, // AMHARIC
+ (29 >= kMinCorrPercent) ? TURKISH : UNKNOWN_LANGUAGE, // AZERBAIJANI
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // GEORGIAN
+ ( 7 >= kMinCorrPercent) ? AMHARIC : UNKNOWN_LANGUAGE, // TIGRINYA
+ (27 >= kMinCorrPercent) ? URDU : UNKNOWN_LANGUAGE, // PERSIAN
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // BOSNIAN
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // SINHALESE
+ (41 >= kMinCorrPercent) ? NORWEGIAN : UNKNOWN_LANGUAGE, // NORWEGIAN_N
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // PORTUGUESE_P
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // PORTUGUESE_B
+ (37 >= kMinCorrPercent) ? ZULU : UNKNOWN_LANGUAGE, // XHOSA
+ (37 >= kMinCorrPercent) ? XHOSA : UNKNOWN_LANGUAGE, // ZULU
+ ( 2 >= kMinCorrPercent) ? SPANISH : UNKNOWN_LANGUAGE, // GUARANI
+ (29 >= kMinCorrPercent) ? TSWANA : UNKNOWN_LANGUAGE, // SESOTHO
+ ( 7 >= kMinCorrPercent) ? TURKISH : UNKNOWN_LANGUAGE, // TURKMEN
+ ( 8 >= kMinCorrPercent) ? KAZAKH : UNKNOWN_LANGUAGE, // KYRGYZ
+ ( 5 >= kMinCorrPercent) ? FRENCH : UNKNOWN_LANGUAGE, // BRETON
+ ( 3 >= kMinCorrPercent) ? GANDA : UNKNOWN_LANGUAGE, // TWI
+ (27 >= kMinCorrPercent) ? HEBREW : UNKNOWN_LANGUAGE, // YIDDISH
+ (28 >= kMinCorrPercent) ? SLOVENIAN : UNKNOWN_LANGUAGE, // SERBO_CROATIAN
+ (12 >= kMinCorrPercent) ? OROMO : UNKNOWN_LANGUAGE, // SOMALI
+ ( 9 >= kMinCorrPercent) ? UZBEK : UNKNOWN_LANGUAGE, // UIGHUR
+ (15 >= kMinCorrPercent) ? PERSIAN : UNKNOWN_LANGUAGE, // KURDISH
+ ( 6 >= kMinCorrPercent) ? KYRGYZ : UNKNOWN_LANGUAGE, // MONGOLIAN
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // ARMENIAN
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // LAOTHIAN
+ ( 8 >= kMinCorrPercent) ? URDU : UNKNOWN_LANGUAGE, // SINDHI
+ (10 >= kMinCorrPercent) ? ITALIAN : UNKNOWN_LANGUAGE, // RHAETO_ROMANCE
+ (31 >= kMinCorrPercent) ? DUTCH : UNKNOWN_LANGUAGE, // AFRIKAANS
+ (17 >= kMinCorrPercent) ? GERMAN : UNKNOWN_LANGUAGE, // LUXEMBOURGISH
+ ( 2 >= kMinCorrPercent) ? SCOTS : UNKNOWN_LANGUAGE, // BURMESE
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // KHMER
+ (45 >= kMinCorrPercent) ? DZONGKHA : UNKNOWN_LANGUAGE, // TIBETAN
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // DHIVEHI
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // CHEROKEE
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // SYRIAC
+ ( 8 >= kMinCorrPercent) ? DUTCH : UNKNOWN_LANGUAGE, // LIMBU
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // ORIYA
+ (14 >= kMinCorrPercent) ? BENGALI : UNKNOWN_LANGUAGE, // ASSAMESE
+ (16 >= kMinCorrPercent) ? ITALIAN : UNKNOWN_LANGUAGE, // CORSICAN
+ ( 5 >= kMinCorrPercent) ? INTERLINGUA : UNKNOWN_LANGUAGE, // INTERLINGUE
+ ( 8 >= kMinCorrPercent) ? KYRGYZ : UNKNOWN_LANGUAGE, // KAZAKH
+ ( 4 >= kMinCorrPercent) ? SWAHILI : UNKNOWN_LANGUAGE, // LINGALA
+ (11 >= kMinCorrPercent) ? RUSSIAN : UNKNOWN_LANGUAGE, // MOLDAVIAN
+ (19 >= kMinCorrPercent) ? PERSIAN : UNKNOWN_LANGUAGE, // PASHTO
+ ( 5 >= kMinCorrPercent) ? AYMARA : UNKNOWN_LANGUAGE, // QUECHUA
+ ( 5 >= kMinCorrPercent) ? KINYARWANDA : UNKNOWN_LANGUAGE, // SHONA
+ (17 >= kMinCorrPercent) ? UZBEK : UNKNOWN_LANGUAGE, // TAJIK
+ (13 >= kMinCorrPercent) ? BASHKIR : UNKNOWN_LANGUAGE, // TATAR
+ (11 >= kMinCorrPercent) ? SAMOAN : UNKNOWN_LANGUAGE, // TONGA
+ ( 2 >= kMinCorrPercent) ? TWI : UNKNOWN_LANGUAGE, // YORUBA
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // CREOLES_AND_PIDGINS_ENGLISH_BASED
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // CREOLES_AND_PIDGINS_FRENCH_BASED
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // CREOLES_AND_PIDGINS_PORTUGUESE_BASED
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // CREOLES_AND_PIDGINS_OTHER
+ ( 6 >= kMinCorrPercent) ? TONGA : UNKNOWN_LANGUAGE, // MAORI
+ ( 3 >= kMinCorrPercent) ? OROMO : UNKNOWN_LANGUAGE, // WOLOF
+ ( 1 >= kMinCorrPercent) ? MONGOLIAN : UNKNOWN_LANGUAGE, // ABKHAZIAN
+ ( 8 >= kMinCorrPercent) ? SOMALI : UNKNOWN_LANGUAGE, // AFAR
+ ( 5 >= kMinCorrPercent) ? QUECHUA : UNKNOWN_LANGUAGE, // AYMARA
+ (13 >= kMinCorrPercent) ? TATAR : UNKNOWN_LANGUAGE, // BASHKIR
+ ( 3 >= kMinCorrPercent) ? ENGLISH : UNKNOWN_LANGUAGE, // BISLAMA
+ (45 >= kMinCorrPercent) ? TIBETAN : UNKNOWN_LANGUAGE, // DZONGKHA
+ ( 4 >= kMinCorrPercent) ? TONGA : UNKNOWN_LANGUAGE, // FIJIAN
+ ( 7 >= kMinCorrPercent) ? INUPIAK : UNKNOWN_LANGUAGE, // GREENLANDIC
+ ( 3 >= kMinCorrPercent) ? AFAR : UNKNOWN_LANGUAGE, // HAUSA
+ ( 3 >= kMinCorrPercent) ? OCCITAN : UNKNOWN_LANGUAGE, // HAITIAN_CREOLE
+ ( 7 >= kMinCorrPercent) ? GREENLANDIC : UNKNOWN_LANGUAGE, // INUPIAK
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // INUKTITUT
+ ( 4 >= kMinCorrPercent) ? HINDI : UNKNOWN_LANGUAGE, // KASHMIRI
+ (30 >= kMinCorrPercent) ? RUNDI : UNKNOWN_LANGUAGE, // KINYARWANDA
+ ( 2 >= kMinCorrPercent) ? TAGALOG : UNKNOWN_LANGUAGE, // MALAGASY
+ (17 >= kMinCorrPercent) ? GERMAN : UNKNOWN_LANGUAGE, // NAURU
+ (12 >= kMinCorrPercent) ? SOMALI : UNKNOWN_LANGUAGE, // OROMO
+ (30 >= kMinCorrPercent) ? KINYARWANDA : UNKNOWN_LANGUAGE, // RUNDI
+ (11 >= kMinCorrPercent) ? TONGA : UNKNOWN_LANGUAGE, // SAMOAN
+ ( 1 >= kMinCorrPercent) ? LINGALA : UNKNOWN_LANGUAGE, // SANGO
+ (32 >= kMinCorrPercent) ? MARATHI : UNKNOWN_LANGUAGE, // SANSKRIT
+ (16 >= kMinCorrPercent) ? ZULU : UNKNOWN_LANGUAGE, // SISWANT
+ ( 5 >= kMinCorrPercent) ? SISWANT : UNKNOWN_LANGUAGE, // TSONGA
+ (29 >= kMinCorrPercent) ? SESOTHO : UNKNOWN_LANGUAGE, // TSWANA
+ ( 2 >= kMinCorrPercent) ? ESTONIAN : UNKNOWN_LANGUAGE, // VOLAPUK
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // ZHUANG
+ ( 1 >= kMinCorrPercent) ? MALAY : UNKNOWN_LANGUAGE, // KHASI
+ (28 >= kMinCorrPercent) ? ENGLISH : UNKNOWN_LANGUAGE, // SCOTS
+ (15 >= kMinCorrPercent) ? KINYARWANDA : UNKNOWN_LANGUAGE, // GANDA
+ ( 7 >= kMinCorrPercent) ? ENGLISH : UNKNOWN_LANGUAGE, // MANX
+ ( 0 >= kMinCorrPercent) ? Unknown : UNKNOWN_LANGUAGE, // MONTENEGRIN
+};
+
+COMPILE_ASSERT(arraysize(kClosestAltLanguage) == NUM_LANGUAGES,
+ kClosestAltLanguage_has_incorrect_size);
+
+
+inline bool FlagFinish(int flags) {return (flags & kCLDFlagFinish) != 0;}
+inline bool FlagSqueeze(int flags) {return (flags & kCLDFlagSqueeze) != 0;}
+inline bool FlagRepeats(int flags) {return (flags & kCLDFlagRepeats) != 0;}
+inline bool FlagTop40(int flags) {return (flags & kCLDFlagTop40) != 0;}
+inline bool FlagShort(int flags) {return (flags & kCLDFlagShort) != 0;}
+inline bool FlagHint(int flags) {return (flags & kCLDFlagHint) != 0;}
+inline bool FlagUseWords(int flags) {return (flags & kCLDFlagUseWords) != 0;}
+
+
+
+
+//------------------------------------------------------------------------------
+// For --cld_html debugging output. Not thread safe
+//------------------------------------------------------------------------------
+static Language prior_lang = UNKNOWN_LANGUAGE;
+static bool prior_unreliable = false;
+
+//------------------------------------------------------------------------------
+// End For --cld_html debugging output
+//------------------------------------------------------------------------------
+
+
+// Backscan to word boundary, returning how many bytes n to go back
+// so that src - n is non-space ans src - n - 1 is space.
+// If not found in kMaxSpaceScan bytes, return 0
+int BackscanToSpace(const char* src, int limit) {
+ int n = 0;
+ limit = cld::minint(limit, kMaxSpaceScan);
+ while (n < limit) {
+ if (src[-n - 1] == ' ') {return n;} // We are at _X
+ ++n;
+ }
+ return 0;
+}
+
+// Forwardscan to word boundary, returning how many bytes n to go forward
+// so that src + n is non-space ans src + n - 1 is space.
+// If not found in kMaxSpaceScan bytes, return 0
+int ForwardscanToSpace(const char* src, int limit) {
+ int n = 0;
+ limit = cld::minint(limit, kMaxSpaceScan);
+ while (n < limit) {
+ if (src[n] == ' ') {return n + 1;} // We are at _X
+ ++n;
+ }
+ return 0;
+}
+
+
+// This uses a cheap predictor to get a measure of compression, and
+// hence a measure of repetitiveness. It works on complete UTF-8 characters
+// instead of bytes, because three-byte UTF-8 Indic, etc. text compress highly
+// all the time when done with a byte-based count. Sigh.
+//
+// To allow running prediction across multiple chunks, caller passes in current
+// 12-bit hash value and int[4096] prediction table. Caller inits these to 0.
+//
+// Returns the number of *bytes* correctly predicted, increments by 1..4 for
+// each correctly-predicted character.
+//
+// NOTE: Overruns by up to three bytes. Not a problem with valid UTF-8 text
+//
+int CountPredictedBytes(const char* isrc, int srclen, int* hash, int* tbl) {
+ int p_count = 0;
+ const uint8* src = reinterpret_cast<const uint8*>(isrc);
+ const uint8* srclimit = src + srclen;
+ int local_hash = *hash;
+
+ while (src < srclimit) {
+ int c = src[0];
+ int incr = 1;
+
+ // Pick up one char and length
+ if (c < 0xc0) {
+ // One-byte or continuation byte: 00xxxxxx 01xxxxxx 10xxxxxx
+ // Do nothing more
+ } else if ((c & 0xe0) == 0xc0) {
+ // Two-byte
+ c = (c << 8) | src[1];
+ incr = 2;
+ } else if ((c & 0xf0) == 0xe0) {
+ // Three-byte
+ c = (c << 16) | (src[1] << 8) | src[2];
+ incr = 3;
+ } else {
+ // Four-byte
+ c = (c << 24) | (src[1] << 16) | (src[2] << 8) | src[3];
+ incr = 4;
+ }
+ src += incr;
+
+ int p = tbl[local_hash]; // Prediction
+ tbl[local_hash] = c; // Update prediction
+ p_count += (c == p); // Count good predictions
+
+ local_hash = ((local_hash << 4) ^ c) & 0xfff;
+ }
+
+ *hash = local_hash;
+ return p_count;
+}
+
+
+
+// Counts number of spaces; a little faster than one-at-a-time
+// Doesn't count odd bytes at end
+int CountSpaces4(const char* src, int src_len) {
+ int s_count = 0;
+ for (int i = 0; i < (src_len & ~3); i += 4) {
+ s_count += (src[i] == ' ');
+ s_count += (src[i+1] == ' ');
+ s_count += (src[i+2] == ' ');
+ s_count += (src[i+3] == ' ');
+ }
+ return s_count;
+}
+
+
+// Remove words of text that have more than half their letters predicted
+// correctly by our cheap predictor, moving the remaining words in-place
+// to the front of the input buffer.
+//
+// To allow running prediction across multiple chunks, caller passes in current
+// 12-bit hash value and int[4096] prediction table. Caller inits these to 0.
+//
+// Return the new, possibly-shorter length
+int CheapRepWordsInplace(char* isrc, int srclen, int* hash, int* tbl) {
+ const uint8* src = reinterpret_cast<const uint8*>(isrc);
+ const uint8* srclimit = src + srclen;
+ char* dst = isrc;
+ int local_hash = *hash;
+ char* word_dst = dst; // Start of next word
+ int good_predict_bytes = 0;
+ int word_length_bytes = 0;
+
+ while (src < srclimit) {
+ int c = src[0];
+ int incr = 1;
+ *dst++ = c;
+
+ if (c == ' ') {
+ if ((good_predict_bytes * 2) > word_length_bytes) {
+ // Word is well-predicted: backup to start of this word
+ dst = word_dst;
+ if (FLAGS_cld_showme) {
+ // Mark the deletion point with period
+ // Don't repeat multiple periods
+ // Cannot mark with more bytes or may overwrite unseen input
+ if ((isrc < (dst - 2)) && (dst[-2] != '.')) {
+ *dst++ = '.';
+ *dst++ = ' ';
+ }
+ }
+ }
+ word_dst = dst; // Start of next word
+ good_predict_bytes = 0;
+ word_length_bytes = 0;
+ }
+
+ // Pick up one char and length
+ if (c < 0xc0) {
+ // One-byte or continuation byte: 00xxxxxx 01xxxxxx 10xxxxxx
+ // Do nothing more
+ } else if ((c & 0xe0) == 0xc0) {
+ // Two-byte
+ *dst++ = src[1];
+ c = (c << 8) | src[1];
+ incr = 2;
+ } else if ((c & 0xf0) == 0xe0) {
+ // Three-byte
+ *dst++ = src[1];
+ *dst++ = src[2];
+ c = (c << 16) | (src[1] << 8) | src[2];
+ incr = 3;
+ } else {
+ // Four-byte
+ *dst++ = src[1];
+ *dst++ = src[2];
+ *dst++ = src[3];
+ c = (c << 24) | (src[1] << 16) | (src[2] << 8) | src[3];
+ incr = 4;
+ }
+ src += incr;
+ word_length_bytes += incr;
+
+ int p = tbl[local_hash]; // Prediction
+ tbl[local_hash] = c; // Update prediction
+ if (c == p) {
+ good_predict_bytes += incr; // Count good predictions
+ }
+
+ local_hash = ((local_hash << 4) ^ c) & 0xfff;
+ }
+
+ *hash = local_hash;
+
+ if ((dst - isrc) < srclen) {
+ // Make last char clean UTF-8 by putting following space off the end
+ dst[0] = ' ';
+ }
+
+ return static_cast<int>(dst - isrc);
+}
+
+
+// Remove portions of text that have a high density of spaces, or that are
+// overly repetitive, squeezing the remaining text in-place to the front of the
+// input buffer.
+//
+// Squeezing looks at density of space/prediced chars in fixed-size chunks,
+// specified by chunksize. A chunksize <= 0 uses the default size of 48 bytes.
+//
+// Return the new, possibly-shorter length
+int CompactLangDetImpl::CheapSqueezeInplace(char* isrc,
+ int srclen,
+ int ichunksize) {
+ char* src = isrc;
+ char* dst = src;
+ char* srclimit = src + srclen;
+ bool skipping = false;
+
+ int hash = 0;
+ // Allocate local prediction table.
+ int* predict_tbl = new int[kPredictionTableSize];
+ memset(predict_tbl, 0, kPredictionTableSize * sizeof(predict_tbl[0]));
+
+ int chunksize = ichunksize;
+ if (chunksize == 0) {chunksize = kChunksizeDefault;}
+ int space_thresh = (chunksize * kSpacesThreshPercent) / 100;
+ int predict_thresh = (chunksize * kPredictThreshPercent) / 100;
+
+ while (src < srclimit) {
+ int remaining_bytes = srclimit - src;
+ int len = cld::minint(chunksize, remaining_bytes);
+ int space_n = CountSpaces4(src, len);
+ int predb_n = CountPredictedBytes(src, len, &hash, predict_tbl);
+ if ((space_n >= space_thresh) || (predb_n >= predict_thresh)) {
+ // Skip the text
+ if (!skipping) {
+ // Keeping-to-skipping transition; do it at a space
+ int n = BackscanToSpace(dst, static_cast<int>(dst - isrc));
+ dst -= n;
+ skipping = true;
+ if (FLAGS_cld_showme) {
+ // Mark the deletion point with black square U+25A0
+ *dst++ = 0xe2;
+ *dst++ = 0x96;
+ *dst++ = 0xa0;
+ *dst++ = ' ';
+ }
+ }
+ } else {
+ // Keep the text
+ if (skipping) {
+ // Skipping-to-keeping transition; do it at a space
+ int n = ForwardscanToSpace(src, len);
+ src += n;
+ remaining_bytes -= n; // Shrink remaining length
+ len -= n;
+ skipping = false;
+ }
+ // "len" can be negative in some cases
+ if (len > 0) {
+ memcpy(dst, src, len);
+ dst += len;
+ }
+ }
+ src += len;
+ }
+
+ if ((dst - isrc) < srclen) {
+ // Make last char clean UTF-8 by putting following space off the end
+ dst[0] = ' ';
+ }
+
+ // Deallocate local prediction table
+ delete[] predict_tbl;
+ return static_cast<int>(dst - isrc);
+}
+
+// Timing 2.8GHz P4 with 170KB input
+// About 90 MB/sec, with or without memcpy, chunksize 48 or 4096
+// Just CountSpaces is about 340 MB/sec
+// Byte-only CountPredictedBytes is about 150 MB/sec
+// Byte-only CountPredictedBytes, conditional tbl[] = is about 85! MB/sec
+// Byte-only CountPredictedBytes is about 180 MB/sec, byte tbl, byte/int c
+// Unjammed byte-only both = 170 MB/sec
+// Jammed byte-only both = 120 MB/sec
+// Back to original w/slight updates, 110 MB/sec
+//
+bool CheapSqueezeTriggerTest(const char* src, int srclen, int testsize) {
+ // Don't trigger at all on short text
+ if (srclen < testsize) {return false;}
+ int space_thresh = (testsize * kSpacesTriggerPercent) / 100;
+ int predict_thresh = (testsize * kPredictTriggerPercent) / 100;
+ int hash = 0;
+ // Allocate local prediction table.
+ int* predict_tbl = new int[kPredictionTableSize];
+ memset(predict_tbl, 0, kPredictionTableSize * sizeof(predict_tbl[0]));
+
+ bool retval = false;
+ if ((CountSpaces4(src, testsize) >= space_thresh) ||
+ (CountPredictedBytes(src, testsize, &hash, predict_tbl) >=
+ predict_thresh)) {
+ retval = true;
+ }
+ // Deallocate local prediction table
+ delete[] predict_tbl;
+ return retval;
+}
+
+
+
+// Close pairs (correlation) language_enum/language_enum
+// id/ms (0.47) 38/40 [1]
+// bo/dz (0.46) 105/135 [2]
+// cz/sk (0.43) 17/68 [3]
+// no/nn (0.42) 10/80 [4]
+// hi/mr (0.38) 35/64 [5]
+// xh/zu (0.37) 83/84 [6]
+// Subscripted by packed language, gives 0 or a subscript in closepair
+// scoring array inside doc_tote
+static const uint8 kClosePair[EXT_NUM_LANGUAGES + 1] = {
+ 0,
+ 0,0,0,0,0,0,0,0, 0,0,4,0,0,0,0,0, 0,3,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+ 0,0,0,5,0,0,1,0, 1,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+ 5,0,0,0,3,0,0,0, 0,0,0,0,0,0,0,0, 4,0,0,6,6,0,0,0, 0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0, 0,2,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,2, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+ // Add new language close-pair number just before here (just use 0)
+};
+
+
+// Delete any extended languages from doc_tote
+void RemoveExtendedLanguages(ToteWithReliability* doc_tote) {
+ for (int sub = 0; sub < doc_tote->MaxSize(); ++sub) {
+ if (cld::UnpackLanguage(doc_tote->Key(sub)) >= NUM_LANGUAGES) {
+ // Effectively remove the extended language by setting key&score to zero
+ if (FLAGS_dbgscore) {
+ fprintf(stderr, "{-%s} ",
+ ExtLanguageCode(cld::UnpackLanguage(doc_tote->Key(sub))));
+ }
+
+ // Delete entry
+ doc_tote->SetKey(sub, 0);
+ doc_tote->SetValue(sub, 0);
+ doc_tote->SetReliability(sub, 0);
+ }
+ }
+}
+
+static const int kMinReliableKeepPercent = 41; // Remove lang if reli < this
+
+// For Tier3 languages, require a minimum number of bytes to be first-place lang
+static const int kGoodFirstT3MinBytes = 24; // <this => no first
+
+// Move bytes for unreliable langs to another lang or UNKNOWN
+// doc_tote is sorted, so cannot Add
+//
+// If both CHINESE and CHINESET are present and unreliable, do not delete both;
+// merge both into CHINESE.
+//
+// we also want to remove Tier3 languages as the first lang if there is very
+// little text like ej1 ej2 ej3 ej4
+// maybe fold this back in earlier
+//
+void RemoveUnreliableLanguages(ToteWithReliability* doc_tote) {
+ // Prepass to merge some low-reliablility languages
+ int total_bytes = 0;
+ for (int sub = 0; sub < doc_tote->MaxSize(); ++sub) {
+ int plang = doc_tote->Key(sub);
+ if (plang == 0) {continue;} // Empty slot
+
+ Language lang = cld::UnpackLanguage(plang);
+ int bytes = doc_tote->Value(sub);
+ int reli = doc_tote->Reliability(sub);
+ if (bytes == 0) {continue;} // Zero bytes
+ total_bytes += bytes;
+
+ // Reliable percent is stored reliable score over stored bytecount
+ int reliable_percent = reli / bytes;
+ if (reliable_percent >= kMinReliableKeepPercent) {continue;} // Keeper
+
+ // This language is too unreliable to keep, but we might merge it.
+ Language altlang = UNKNOWN_LANGUAGE;
+ if (lang < NUM_LANGUAGES) {altlang = kClosestAltLanguage[lang];}
+ if (altlang == UNKNOWN_LANGUAGE) {continue;} // No alternative
+
+ // Look for alternative in doc_tote
+ int altsub = doc_tote->Find(cld::PackLanguage(altlang));
+ if (altsub < 0) {continue;} // No alternative text
+
+ int bytes2 = doc_tote->Value(altsub);
+ int reli2 = doc_tote->Reliability(altsub);
+ if (bytes2 == 0) {continue;} // Zero bytes
+
+ // Reliable percent is stored reliable score over stored bytecount
+ int reliable_percent2 = reli2 / bytes2;
+
+ // Merge one language into the other. Break ties toward lower lang #
+ int tosub = altsub;
+ int fromsub = sub;
+ bool into_lang = false;
+ if ((reliable_percent2 < reliable_percent) ||
+ ((reliable_percent2 == reliable_percent) && (lang < altlang))) {
+ tosub = sub;
+ fromsub = altsub;
+ into_lang = true;
+ }
+
+ // Make sure reliability doesn't drop and is enough to avoid delete
+ int newpercent = cld::maxint(reliable_percent, reliable_percent2);
+ newpercent = cld::maxint(newpercent, kMinReliableKeepPercent);
+ int newbytes = bytes + bytes2;
+ int newreli = newpercent * newbytes;
+
+ doc_tote->SetKey(fromsub, 0);
+ doc_tote->SetValue(fromsub, 0);
+ doc_tote->SetReliability(fromsub, 0);
+ doc_tote->SetValue(tosub, newbytes);
+ doc_tote->SetReliability(tosub, newreli);
+
+ // Show fate of unreliable languages if at least 10 bytes
+ if (FLAGS_cld_html /*&& (newpercent >= 10)*/ && (newbytes >= 10)) {
+ if (into_lang) {
+ fprintf(stderr, "{Unreli %s.%d(%dB) => %s} ",
+ ExtLanguageCode(altlang), reliable_percent2, bytes2,
+ ExtLanguageCode(lang));
+ } else {
+ fprintf(stderr, "{Unreli %s.%d(%dB) => %s} ",
+ ExtLanguageCode(lang), reliable_percent, bytes,
+ ExtLanguageCode(altlang));
+ }
+ }
+ }
+
+
+ // Pass to delete any remaining unreliable languages
+ for (int sub = 0; sub < doc_tote->MaxSize(); ++sub) {
+ int plang = doc_tote->Key(sub);
+ if (plang == 0) {continue;} // Empty slot
+
+ Language lang = cld::UnpackLanguage(plang);
+ int bytes = doc_tote->Value(sub);
+ int reli = doc_tote->Reliability(sub);
+ if (bytes == 0) {continue;} // Zero bytes
+
+ bool is_tier3 = (cld::kIsPackedTop40[plang] == 0);
+ if (is_tier3 &&
+ (bytes < kGoodFirstT3MinBytes) &&
+ (bytes < total_bytes)) {
+ reli = 0; // Too-short tier3
+ }
+
+ // Reliable percent is stored as reliable score over stored bytecount
+ int reliable_percent = reli / bytes;
+ if (reliable_percent >= kMinReliableKeepPercent) {continue;} // Keeper
+
+ // Delete unreliable entry
+ doc_tote->SetKey(sub, 0);
+ doc_tote->SetValue(sub, 0);
+ doc_tote->SetReliability(sub, 0);
+
+ // Show fate of unreliable languages if at least 10 bytes
+ if (FLAGS_cld_html /*&& (reliable_percent >= 10)*/ && (bytes >= 10)) {
+ fprintf(stderr, "{Unreli %s.%d(%dB)} ",
+ ExtLanguageCode(lang), reliable_percent, bytes);
+ }
+ }
+
+ if (FLAGS_cld_html) {fprintf(stderr, "<br>\n");}
+}
+
+
+// Move less likely byte count to more likely for close pairs of languages
+void RefineScoredClosePairs(ToteWithReliability* doc_tote) {
+ for (int sub = 0; sub < doc_tote->MaxSize(); ++sub) {
+ int close_packedlang = doc_tote->Key(sub);
+ int subscr = kClosePair[close_packedlang];
+ if (subscr == 0) {continue;}
+
+ // We have a close pair language -- if the other one is also scored and the
+ // longword score differs enough, put all our eggs into one basket
+
+ // Nonzero longword score: Go look for the other of this pair
+ for (int sub2 = sub + 1; sub2 < doc_tote->MaxSize(); ++sub2) {
+ if (kClosePair[doc_tote->Key(sub2)] == subscr) {
+ // We have a matching pair
+ int close_packedlang2 = doc_tote->Key(sub2);
+
+ // Move all the text bytes from lower byte-count to higher one
+ int from_sub, to_sub;
+ Language from_lang, to_lang;
+ if (doc_tote->Value(sub) < doc_tote->Value(sub2)) {
+ from_sub = sub;
+ to_sub = sub2;
+ from_lang = cld::UnpackLanguage(close_packedlang);
+ to_lang = cld::UnpackLanguage(close_packedlang2);
+ } else {
+ from_sub = sub2;
+ to_sub = sub;
+ from_lang = cld::UnpackLanguage(close_packedlang2);
+ to_lang = cld::UnpackLanguage(close_packedlang);
+ }
+
+ // Move all the bytes smaller => larger of the pair
+ if (FLAGS_cld_html || FLAGS_dbgscore) {
+ // Show fate of closepair language
+ int val = doc_tote->Value(from_sub);
+ int reli = doc_tote->Reliability(from_sub);
+ int reliable_percent = reli / (val ? val : 1); // avoid zdiv
+ fprintf(stderr, "{CloseLangPair: %s.%d%%(%dB) => %s} ",
+ ExtLanguageCode(from_lang),
+ reliable_percent,
+ doc_tote->Value(from_sub),
+ ExtLanguageCode(to_lang));
+ }
+ int sum = doc_tote->Value(to_sub) + doc_tote->Value(from_sub);
+ doc_tote->SetValue(to_sub, sum);
+ doc_tote->SetReliability(to_sub, 100 * sum);
+
+ // Delete old entry
+ doc_tote->SetKey(from_sub, 0);
+ doc_tote->SetValue(from_sub, 0);
+ doc_tote->SetReliability(from_sub, 0);
+
+ break; // Exit inner for sub2 loop
+ }
+ } // End for sub2
+ } // End for sub
+}
+
+
+void ApplyLanguageHints(Tote* chunk_tote, int tote_grams,
+ uint8* lang_hint_boost) {
+ // Need 8 quad/unigrams to give full hint boost, else derate linearly
+ if (tote_grams > 8) {
+ tote_grams = 8;
+ }
+ for (int sub = 0; sub < chunk_tote->MaxSize(); ++sub) {
+ // Hint boosts are per packed subscript
+ int lang_sub = chunk_tote->Key(sub);
+ int new_value = chunk_tote->Value(sub) +
+ ((lang_hint_boost[lang_sub] * tote_grams) >> 3);
+ chunk_tote->SetValue(sub, new_value);
+ if (FLAGS_dbgscore && (lang_hint_boost[lang_sub] > 0)) {
+ fprintf(stderr, "[%s+=%d*%d/8] ",
+ ExtLanguageCode(cld::UnpackLanguage(lang_sub)),
+ lang_hint_boost[lang_sub], tote_grams);
+ }
+ }
+}
+
+
+void PrintHtmlEscapedText(FILE* f, const char* txt, int len) {
+ for (int i = 0; i < len; ++i) {
+ char c = txt[i];
+ if (c == '<') {
+ fprintf(f, "&lt;");
+ } else if (c == '>') {
+ fprintf(f, "&gt;");
+ } else if (c == '&') {
+ fprintf(f, "&amp;");
+ } else if (c == '\'') {
+ fprintf(f, "&apos;");
+ } else if (c == '"') {
+ fprintf(f, "&quot;");
+ } else {
+ fprintf(f, "%c", c);
+ }
+ }
+ fprintf(f, "<br>\n");
+}
+
+
+// Add one chunk's score to running document score
+// If the top language is UNKNOWN_LANGUAGE, score nothing. This is used to
+// positively identify text to be ignored, such as link farms.
+// Sort before scoring and reinit afterward
+//
+// src and srclen are just for debug output
+void ScoreChunkIntoDoc(const char* src, int srclen, int advance_by,
+ UnicodeLScript lscript,
+ Tote* chunk_tote,
+ ToteWithReliability* doc_tote,
+ int tote_grams,
+ uint8* lang_hint_boost) {
+ // Apply hints before sorting
+ if (lang_hint_boost) {
+ ApplyLanguageHints(chunk_tote, tote_grams, lang_hint_boost);
+ }
+
+ // Sort to get top two languages
+ chunk_tote->Sort(2);
+ Language cur_lang = cld::UnpackLanguage(chunk_tote->Key(0));
+
+ // Return if empty
+ if (cur_lang < 0) {
+ chunk_tote->Reinit();
+ return;
+ }
+
+ bool cur_unreliable = false;
+
+ // Reliability is a function of mean script score per KB of text
+ int len = chunk_tote->GetByteCount();
+ int reliability = cld::GetReliability((len * 2) / advance_by,
+ lscript,
+ chunk_tote);
+ cur_unreliable = (reliability < cld::kMinReliable);
+
+ // If tote_grams=0, always reliable
+ // If tote_grams=1, always unreliable
+ if (tote_grams == 0) {
+ reliability = 100;
+ cur_unreliable = false;
+ } else if (tote_grams == 1) {
+ reliability = 0;
+ cur_unreliable = true;
+ }
+
+#if 0
+ // TEMP
+ if (FLAGS_cld_html) {
+ if (reliability >= kMinReliableKeepPercent) {
+ fprintf(stderr, "R%d%% ", reliability);
+ } else {
+ fprintf(stderr, "--R%d%% ", reliability);
+ }
+ }
+#endif
+
+ // Track the sequence of language fragments [result currently unused]
+ ////if (reliability >= kMinReliableSeq) {
+ //// doc_tote->AddSeq(chunk_tote->Key(0));
+ ////}
+
+ if (cur_unreliable && (chunk_tote->Key(1) != 0)) {
+ // Unreliable and two top contenders, split byte count 5/8 - 3/8
+ int top_len = ((len * 5) + 4) >> 3;
+ int second_len = len - top_len;
+
+ doc_tote->Add(chunk_tote->Key(0),
+ top_len, chunk_tote->Value(0), reliability);
+ doc_tote->Add(chunk_tote->Key(1),
+ second_len, chunk_tote->Value(1), reliability);
+ if (FLAGS_dbgscore) {
+ fprintf(stderr, "{+%s.%d.%dR(%dB) +%s.%d.%dR(%dB)} ",
+ ExtLanguageCode(cld::UnpackLanguage(chunk_tote->Key(0))),
+ chunk_tote->Value(0),
+ reliability,
+ top_len,
+ ExtLanguageCode(cld::UnpackLanguage(chunk_tote->Key(1))),
+ chunk_tote->Value(1),
+ reliability,
+ second_len);
+ }
+ } else {
+ // Reliable or single contender
+ doc_tote->Add(chunk_tote->Key(0),
+ len, chunk_tote->Value(0), reliability);
+ if (FLAGS_dbgscore) {
+ fprintf(stderr, "{+%s.%d.%dR(%dB)} ",
+ ExtLanguageCode(cld::UnpackLanguage(chunk_tote->Key(0))),
+ chunk_tote->Value(0),
+ reliability,
+ len);
+ }
+ }
+
+ if (FLAGS_cld_html) {
+ if (cur_lang < 0) {cur_lang = UNKNOWN_LANGUAGE;}
+ cld::PrintLang(stderr, chunk_tote,
+ cur_lang, cur_unreliable,
+ prior_lang, prior_unreliable);
+ prior_lang = cur_lang;
+ prior_unreliable = cur_unreliable;
+
+ string temp(src, srclen);
+ if (temp[0] == '=') {
+ // Rewrite =ScriptX= or =SwitchX= as =Xxxx= for script code Xxxx
+ temp = "=Buffered_";
+ temp.append(UnicodeLScriptCode(lscript));
+ temp.append("=");
+ }
+ cld::PrintText(stderr, cur_lang, temp);
+ }
+
+ chunk_tote->Reinit();
+}
+
+
+void PrintTopLang(Language top_lang) {
+ if ((top_lang == prior_lang) && (top_lang != UNKNOWN_LANGUAGE)) {
+ fprintf(stderr, "[] ");
+ } else {
+ fprintf(stderr, "[%s] ", ExtLanguageName(top_lang));
+ prior_lang = top_lang;
+ }
+}
+
+void PrintTopLangSpeculative(Language top_lang) {
+ fprintf(stderr, "<span style=\"color:#%06X;\">", 0xa0a0a0);
+ if ((top_lang == prior_lang) && (top_lang != UNKNOWN_LANGUAGE)) {
+ fprintf(stderr, "[] ");
+ } else {
+ fprintf(stderr, "[%s] ", ExtLanguageName(top_lang));
+ prior_lang = top_lang;
+ }
+ fprintf(stderr, "</span>\n");
+}
+
+
+// Add one chunk's score to running document score
+// Convenience function with constant src text
+void ScoreChunkIntoDoc2(const char* src, int advance_by,
+ UnicodeLScript lscript,
+ Tote* chunk_tote,
+ ToteWithReliability* doc_tote,
+ int tote_grams,
+ uint8* lang_hint_boost) {
+ int srclen = static_cast<int>(strlen(src));
+ ScoreChunkIntoDoc(src, srclen, advance_by, lscript, chunk_tote,
+ doc_tote, tote_grams, lang_hint_boost);
+}
+
+
+// Score one scriptspan using the only language for that script
+void ScoreNilgrams(getone::LangSpan* scriptspan, int lang,
+ ToteWithReliability* doc_tote,
+ uint8* lang_hint_boost,
+ int flags, Language plus_one) {
+ // For debugging only. Not thread-safe
+ prior_lang = UNKNOWN_LANGUAGE;
+ prior_unreliable = false;
+
+ const char* src = scriptspan->text;
+ int len = scriptspan->text_bytes;
+
+ Tote chunk_tote;
+ // Score 1000 for 1000 bytes
+ chunk_tote.AddGram();
+ chunk_tote.Add(lang, scriptspan->text_bytes);
+ chunk_tote.AddBytes(scriptspan->text_bytes);
+ int advance_by = 2;
+ int tote_grams = 0; // Indicates fully reliable
+ ScoreChunkIntoDoc(src, len, advance_by,
+ scriptspan->script, &chunk_tote,
+ doc_tote, tote_grams, lang_hint_boost);
+}
+
+// Score one scriptspan using unigrams
+// Updates tote_grams
+void ScoreUnigrams(getone::LangSpan* scriptspan,
+ int* tote_grams, int gram_limit,
+ Tote* chunk_tote,
+ ToteWithReliability* doc_tote,
+ uint8* lang_hint_boost,
+ int advance_by, int flags,
+ int* initial_word_span, Language plus_one) {
+ // chunk_tote may have partial sum coming in
+ const char* src = scriptspan->text;
+ const char* srclimit = src + scriptspan->text_bytes;
+
+ // For debugging only. Not thread-safe
+ prior_lang = UNKNOWN_LANGUAGE;
+ prior_unreliable = false;
+
+ // Break text up into multiple chunks and score each
+ while (src < srclimit) {
+ // Updates tote_grams
+ int len = cld::DoUniScoreV3(&compact_lang_det_generated_ctjkvz_b1_obj,
+ src, srclimit - src, advance_by,
+ tote_grams, gram_limit, chunk_tote);
+ if (FlagUseWords(flags) || (*initial_word_span > 0)) {
+ // Use bigram scoring in addition to quadgrams
+ cld::DoBigramScoreV3(&kCjkBiTable_obj,
+ src, len, chunk_tote);
+ }
+ chunk_tote->AddBytes(len);
+ *initial_word_span -= len;
+
+ if (*tote_grams >= gram_limit) {
+ // Add this chunk to doc totals
+ // Remove all but top40 if asked
+ if (FlagTop40(flags)) {
+ cld::DemoteNotTop40(chunk_tote, cld::PackLanguage(plus_one));
+ }
+
+ // Sort, accumulate into doc total, reinit
+ ScoreChunkIntoDoc(src, len, advance_by,
+ scriptspan->script, chunk_tote,
+ doc_tote, *tote_grams, lang_hint_boost);
+ *tote_grams = 0;
+ } else {
+ if (FLAGS_cld_html) {
+ string temp(src, len);
+ Language top_lang = cld::UnpackLanguage(chunk_tote->CurrentTopKey());
+ PrintTopLangSpeculative(top_lang);
+ cld::PrintText(stderr, top_lang, temp);
+ }
+ }
+ src += len;
+ }
+ // chunk_tote may have partial sum going out
+}
+
+// Back up one UTF-8 character
+const uint8* BackOneUTF8(const uint8* p) {
+ const uint8* retval = p - 1;
+ if ((*retval & 0xc0) == 0x80) {--retval;}
+ if ((*retval & 0xc0) == 0x80) {--retval;}
+ if ((*retval & 0xc0) == 0x80) {--retval;}
+ return retval;
+}
+
+
+// Score one scriptspan using quadgrams
+// Incoming chunk_tote may have partial accumulation
+void ScoreQuadgrams(getone::LangSpan* scriptspan,
+ int* tote_grams, int gram_limit,
+ Tote* chunk_tote,
+ ToteWithReliability* doc_tote,
+ uint8* lang_hint_boost,
+ int advance_by, int flags,
+ int* initial_word_span, Language plus_one) {
+ // chunk_tote may have partial sum coming in
+ const char* src = scriptspan->text;
+ const char* srclimit = src + scriptspan->text_bytes;
+ const char* lastscored_src = src;
+
+ // For debugging only. Not thread-safe
+ prior_lang = UNKNOWN_LANGUAGE;
+ prior_unreliable = false;
+
+ // Break text up into multiple chunks and score each
+ while (src < srclimit) {
+ // Updates tote_grams
+ int len = cld::DoQuadScoreV3(&kQuadTable_obj,
+ src, srclimit - src, advance_by,
+ tote_grams, gram_limit, chunk_tote);
+ if (FlagUseWords(flags) || (*initial_word_span > 0)) {
+ // Use word scoring in addition to quadgrams
+ cld::DoOctaScoreV3(&kLongWord8Table_obj,
+ src, len, chunk_tote);
+ }
+ chunk_tote->AddBytes(len);
+ *initial_word_span -= len;
+
+ if (*tote_grams >= gram_limit) {
+ // Remove all but top40 if asked
+ if (FlagTop40(flags)) {
+ cld::DemoteNotTop40(chunk_tote, cld::PackLanguage(plus_one));
+ }
+
+ // Sort, accumulate into doc total, reinit
+ ScoreChunkIntoDoc(src, len, advance_by,
+ scriptspan->script, chunk_tote,
+ doc_tote, *tote_grams, lang_hint_boost);
+ lastscored_src = src + len;
+ *tote_grams = 0;
+ } else {
+ if (FLAGS_cld_html) {
+ string temp(src, len);
+ Language top_lang = cld::UnpackLanguage(chunk_tote->CurrentTopKey());
+ PrintTopLangSpeculative(top_lang);
+ cld::PrintText(stderr, top_lang, temp);
+ }
+ }
+ src += len;
+ }
+}
+
+
+
+void PrintLangs(FILE* f, const Language* language3, const int* percent3,
+ const int* text_bytes, const bool* is_reliable) {
+ fprintf(f, "<br>&nbsp;&nbsp;Initial_Languages ");
+ if (language3[0] != UNKNOWN_LANGUAGE) {
+ fprintf(f, "%s%s(%d%%) ",
+ ExtLanguageName(language3[0]),
+ *is_reliable ? "" : "*",
+ percent3[0]);
+ }
+ if (language3[1] != UNKNOWN_LANGUAGE) {
+ fprintf(f, "%s(%d%%) ", ExtLanguageName(language3[1]), percent3[1]);
+ }
+ if (language3[2] != UNKNOWN_LANGUAGE) {
+ fprintf(f, "%s(%d%%) ", ExtLanguageName(language3[2]), percent3[2]);
+ }
+ fprintf(f, "%d bytes \n", *text_bytes);
+
+ fprintf(f, "<br>\n");
+}
+
+
+// Start the tote with a count of one for the default language for script
+void InitScriptToteLang(Tote* script_tote, UnicodeLScript lscript) {
+ Language defaultlang = cld::kDefaultLanguagePerLScript[lscript];
+ script_tote->Add(cld::PackLanguage(defaultlang), 1);
+ script_tote->AddBytes(1);
+#if 0
+ if (FLAGS_cld_html) {
+ cld::PrintLang(stderr, script_tote,
+ defaultlang, false,
+ UNKNOWN_LANGUAGE, false);
+ prior_lang = cur_lang;
+ string temp("+1");
+ cld::PrintText(stderr, defaultlang, temp);
+ }
+#endif
+}
+
+static const char* const kToteName[4] =
+ {"=Latn=", "=Hani=", "=Script2=", "=Script3="};
+static const char* const kToteSwitch[4] =
+ {"=Latn=", "=Hani=", "=Switch2=", "=Switch3="};
+
+
+
+// Upper to lower, keep digits, everything else to minus '-' (2d)
+static const char kCharsetToLowerTbl[256] = {
+ 0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d, 0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,
+ 0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d, 0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,
+ 0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d, 0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,
+ 0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37, 0x38,0x39,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,
+
+ 0x2d,0x61,0x62,0x63,0x64,0x65,0x66,0x67, 0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f,
+ 0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77, 0x78,0x79,0x7a,0x2d,0x2d,0x2d,0x2d,0x2d,
+ 0x2d,0x61,0x62,0x63,0x64,0x65,0x66,0x67, 0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f,
+ 0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77, 0x78,0x79,0x7a,0x2d,0x2d,0x2d,0x2d,0x2d,
+
+ 0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d, 0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,
+ 0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d, 0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,
+ 0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d, 0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,
+ 0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d, 0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,
+
+ 0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d, 0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,
+ 0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d, 0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,
+ 0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d, 0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,
+ 0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d, 0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,0x2d,
+};
+
+
+static const char kIsAlpha[256] = {
+ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+ 0,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,0,0,0,0,0,
+ 0,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,0,0,0,0,0,
+
+ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+};
+
+static const char kIsDigit[256] = {
+ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 1,1,1,1,1,1,1,1, 1,1,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+
+ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+};
+
+// Normalize ASCII string to first 4 alphabetic/digit chars
+// Letters are forced to lowercase ASCII
+// Used to normalize TLD values
+void MakeChar4(const char* str, char* norm) {
+ memcpy(norm, "____", 4); // four underscores
+ int l_ptr = 0;
+ for (int i = 0; i < strlen(str); ++i) {
+ uint8 uc = static_cast<uint8>(str[i]);
+ if (kIsAlpha[uc] | kIsDigit[uc]) {
+ if (l_ptr < 4) { // Else ignore
+ norm[l_ptr] = kCharsetToLowerTbl[uc];
+ l_ptr++;
+ }
+ }
+ }
+}
+
+// Find subscript of matching key in first 4 bytes of sorted hint array, or -1
+static int HintBinaryLookup4(const HintEntry* hintprobs, int hintprobssize,
+ const char* norm_key) {
+ // Key is always in range [lo..hi)
+ int lo = 0;
+ int hi = hintprobssize;
+ while (lo < hi) {
+ int mid = (lo + hi) >> 1;
+ int comp = memcmp(&hintprobs[mid].key[0], norm_key, 4);
+ if (comp < 0) {
+ lo = mid + 1;
+ } else if (comp > 0) {
+ hi = mid;
+ } else {
+ return mid;
+ }
+ }
+ return -1;
+}
+
+
+// Increment the initial probabilities based on a per-TLD probs entry
+void ApplyTLDHint(uint8* lang_hint_boost, const char* tld_hint) {
+ if (FLAGS_dbgscore) {
+ fprintf(stderr, "TLD hint %s\n", tld_hint);
+ }
+ char normalized_tld[8];
+ MakeChar4(tld_hint, normalized_tld);
+ int n = HintBinaryLookup4(kTLDHintProbs, kTLDHintProbsSize,
+ normalized_tld);
+ // TLD is four bytes, probability entry is 4 bytes
+ if (n >= 0) {
+ uint32 probs = kTLDHintProbs[n].probs;
+
+ uint8 prob123 = (probs >> 0) & 0xff;
+ const uint8* prob123_entry = cld::LgProb2TblEntry(prob123);
+ uint8 top1 = (probs >> 8) & 0xff;
+ if (top1 > 0) {lang_hint_boost[top1] += cld::LgProb3(prob123_entry, 0);}
+ uint8 top2 = (probs >> 16) & 0xff;
+ if (top2 > 0) {lang_hint_boost[top2] += cld::LgProb3(prob123_entry, 1);}
+ uint8 top3 = (probs >> 24) & 0xff;
+ if (top3 > 0) {lang_hint_boost[top3] += cld::LgProb3(prob123_entry, 2);}
+ }
+}
+
+
+// Increment the initial probabilities based on a per-encoding probs entry
+void ApplyEncodingHint(uint8* lang_hint_boost, int encoding_hint) {
+ if (FLAGS_dbgscore) {
+ Encoding tempenc = static_cast<Encoding>(encoding_hint);
+ fprintf(stderr, "ENC hint %s\n", EncodingName(tempenc));
+ }
+ if (encoding_hint < ISO_8859_1) {return;}
+ if (encoding_hint >= NUM_ENCODINGS) {return;}
+ uint32 probs = kEncodingHintProbs[encoding_hint];
+
+ uint8 prob123 = (probs >> 0) & 0xff;
+ const uint8* prob123_entry = cld::LgProb2TblEntry(prob123);
+ uint8 top1 = (probs >> 8) & 0xff;
+ if (top1 > 0) {lang_hint_boost[top1] += cld::LgProb3(prob123_entry, 0);}
+ uint8 top2 = (probs >> 16) & 0xff;
+ if (top2 > 0) {lang_hint_boost[top2] += cld::LgProb3(prob123_entry, 1);}
+ uint8 top3 = (probs >> 24) & 0xff;
+ if (top3 > 0) {lang_hint_boost[top3] += cld::LgProb3(prob123_entry, 2);}
+}
+
+
+// Increment the initial probability for given language by fixed amount
+// Does not recognize extended languages as hints
+void ApplyLanguageHint(uint8* lang_hint_boost, Language language_hint) {
+ if (FLAGS_dbgscore) {
+ fprintf(stderr, "LANG hint %s\n", ExtLanguageName(language_hint));
+ }
+ if (language_hint < ENGLISH) {return;}
+ if (language_hint >= NUM_LANGUAGES) {return;}
+ uint32 probs = kLanguageHintProbs[language_hint];
+
+ uint8 prob123 = (probs >> 0) & 0xff;
+ const uint8* prob123_entry = cld::LgProb2TblEntry(prob123);
+ uint8 top1 = (probs >> 8) & 0xff;
+ if (top1 > 0) {lang_hint_boost[top1] += cld::LgProb3(prob123_entry, 0);}
+ uint8 top2 = (probs >> 16) & 0xff;
+ if (top2 > 0) {lang_hint_boost[top2] += cld::LgProb3(prob123_entry, 1);}
+ uint8 top3 = (probs >> 24) & 0xff;
+ if (top3 > 0) {lang_hint_boost[top3] += cld::LgProb3(prob123_entry, 2);}
+}
+
+// Extract return values before fixups
+void ExtractLangEtc(ToteWithReliability* doc_tote, int total_text_bytes,
+ int* reliable_percent3, Language* language3, int* percent3,
+ double* normalized_score3,
+ int* text_bytes, bool* is_reliable) {
+ reliable_percent3[0] = 0;
+ reliable_percent3[1] = 0;
+ reliable_percent3[2] = 0;
+ language3[0] = UNKNOWN_LANGUAGE;
+ language3[1] = UNKNOWN_LANGUAGE;
+ language3[2] = UNKNOWN_LANGUAGE;
+ percent3[0] = 100;
+ percent3[1] = 0;
+ percent3[2] = 0;
+ normalized_score3[0] = 0.0;
+ normalized_score3[1] = 0.0;
+ normalized_score3[2] = 0.0;
+
+ *text_bytes = total_text_bytes;
+ *is_reliable = false;
+
+ int bytecount1 = total_text_bytes;
+ int bytecount2 = 0;
+ int bytecount3 = 0;
+
+ int lang1 = doc_tote->Key(0);
+ if (lang1 != 0) {
+ // We have a top language
+ language3[0] = cld::UnpackLanguage(lang1);
+ bytecount1 = doc_tote->Value(0);
+ int reli1 = doc_tote->Reliability(0);
+ reliable_percent3[0] = reli1 / (bytecount1 ? bytecount1 : 1); // avoid zdiv
+ normalized_score3[0] = cld::GetNormalizedScore(language3[0],
+ ULScript_Common,
+ bytecount1,
+ doc_tote->Score(0));
+ }
+
+ int lang2 = doc_tote->Key(1);
+ if (lang2 != 0) {
+ language3[1] = cld::UnpackLanguage(lang2);
+ bytecount2 = doc_tote->Value(1);
+ int reli2 = doc_tote->Reliability(1);
+ reliable_percent3[1] = reli2 / (bytecount2 ? bytecount2 : 1); // avoid zdiv
+ normalized_score3[1] = cld::GetNormalizedScore(language3[1],
+ ULScript_Common,
+ bytecount2,
+ doc_tote->Score(1));
+ }
+
+ int lang3 = doc_tote->Key(2);
+ if (lang3 != 0) {
+ language3[2] = cld::UnpackLanguage(lang3);
+ bytecount3 = doc_tote->Value(2);
+ int reli3 = doc_tote->Reliability(2);
+ reliable_percent3[2] = reli3 / (bytecount3 ? bytecount3 : 1); // avoid zdiv
+ normalized_score3[2] = cld::GetNormalizedScore(language3[2],
+ ULScript_Common,
+ bytecount3,
+ doc_tote->Score(2));
+ }
+
+ // Increase total bytes to sum (top 3) if low for some reason
+ int total_bytecount12 = bytecount1 + bytecount2;
+ int total_bytecount123 = total_bytecount12 + bytecount3;
+ if (total_text_bytes < total_bytecount123) {
+ total_text_bytes = total_bytecount123;
+ *text_bytes = total_text_bytes;
+ }
+
+ // Sum minus previous % gives better roundoff behavior than bytecount/total
+ int total_text_bytes_div = cld::maxint(1, total_text_bytes); // Avoid zdiv
+ percent3[0] = (bytecount1 * 100) / total_text_bytes_div;
+ percent3[1] = (total_bytecount12 * 100) / total_text_bytes_div;
+ percent3[2] = (total_bytecount123 * 100) / total_text_bytes_div;
+ percent3[2] -= percent3[1];
+ percent3[1] -= percent3[0];
+
+ // Roundoff, say 96% 1.6% 1.4%, will produce non-obvious 96% 1% 2%
+ // Fix this explicitly
+ if (percent3[1] < percent3[2]) {
+ ++percent3[1];
+ --percent3[2];
+ }
+ if (percent3[0] < percent3[1]) {
+ ++percent3[0];
+ --percent3[1];
+ }
+
+ *text_bytes = total_text_bytes;
+
+ if (lang1 != 0) {
+ // We have a top language
+ // Its reliability is overal result reliability
+ int bytecount = doc_tote->Value(0);
+ int reli = doc_tote->Reliability(0);
+ int reliable_percent = reli / (bytecount ? bytecount : 1); // avoid zdiv
+ *is_reliable = reliable_percent >= cld::kMinReliable;
+ } else {
+ // No top language at all. This can happen with zero text or 100% Klingon
+ // if extended=false. Just return all UNKNOWN_LANGUAGE, reliable.
+ *is_reliable = true;
+ }
+}
+
+bool IsFIGS(Language lang) {
+ if (lang == FRENCH) {return true;}
+ if (lang == ITALIAN) {return true;}
+ if (lang == GERMAN) {return true;}
+ if (lang == SPANISH) {return true;}
+ return false;
+}
+
+bool IsEFIGS(Language lang) {
+ if (lang == ENGLISH) {return true;}
+ if (lang == FRENCH) {return true;}
+ if (lang == ITALIAN) {return true;}
+ if (lang == GERMAN) {return true;}
+ if (lang == SPANISH) {return true;}
+ return false;
+}
+
+static const int kNonEnBoilerplateMinPercent = 17; // <this => no second
+static const int kNonFIGSBoilerplateMinPercent = 20; // <this => no second
+static const int kGoodFirstMinPercent = 26; // <this => UNK
+static const int kGoodFirstReliableMinPercent = 51; // <this => unreli
+static const int kIgnoreMaxPercent = 95; // >this => unreli
+static const int kKeepMinPercent = 2; // <this => unreli
+
+// For Tier3 languages, require more bytes of text to override
+// the first-place language
+static const int kGoodSecondT1T2MinBytes = 15; // <this => no second
+static const int kGoodSecondT3MinBytes = 128; // <this => no second
+ //
+
+// Calculate a single summary language for the document, and its reliability.
+// Returns language3[0] or language3[1] or ENGLISH or UNKNOWN_LANGUAGE
+// This is the heart of matching human-rater perception.
+// reliable_percent3[] is currently unused
+//
+// Do not return Tier3 second language unless there are at least 128 bytes
+void CalcSummaryLang(ToteWithReliability* doc_tote, int total_text_bytes,
+ const int* reliable_percent3,
+ const Language* language3,
+ const int* percent3,
+ Language* summary_lang, bool* is_reliable) {
+ // Vector of active languages; changes if we delete some
+ int slot_count = 3;
+ int active_slot[3] = {0, 1, 2};
+
+ int ignore_percent = 0;
+ int return_percent = percent3[0]; // Default to top lang
+ *summary_lang = language3[0];
+ *is_reliable = true;
+ if (percent3[0] < kKeepMinPercent) {*is_reliable = false;}
+
+ // If any of top 3 is IGNORE, remove it and increment ignore_percent
+ for (int i = 0; i < 3; ++i) {
+ if (language3[i] == TG_UNKNOWN_LANGUAGE) {
+ ignore_percent += percent3[i];
+ // Move the rest up, levaing input vectors unchanged
+ for (int j=i+1; j < 3; ++j) {
+ active_slot[j - 1] = active_slot[j];
+ }
+ -- slot_count;
+ // Logically remove Ignore from percentage-text calculation
+ // (extra 1 in 101 avoids zdiv, biases slightly small)
+ return_percent = (percent3[0] * 100) / (101 - ignore_percent);
+ *summary_lang = language3[active_slot[0]];
+ if (percent3[active_slot[0]] < kKeepMinPercent) {*is_reliable = false;}
+ }
+ }
+
+
+ // If English and X, where X (not UNK) is big enough,
+ // assume the English is boilerplate and return X.
+ // Logically remove English from percentage-text calculation
+ int second_bytes = (total_text_bytes * percent3[active_slot[1]]) / 100;
+ // Require more bytes of text for Tier3 languages
+ int minbytesneeded = kGoodSecondT1T2MinBytes;
+ int plang_second = cld::PackLanguage(language3[active_slot[1]]);
+ bool is_tier3 = (cld::kIsPackedTop40[plang_second] == 0);
+ if (is_tier3) {
+ minbytesneeded = kGoodSecondT3MinBytes;
+ }
+
+ if ((language3[active_slot[0]] == ENGLISH) &&
+ (language3[active_slot[1]] != ENGLISH) &&
+ (language3[active_slot[1]] != UNKNOWN_LANGUAGE) &&
+ (percent3[active_slot[1]] >= kNonEnBoilerplateMinPercent) &&
+ (second_bytes >= minbytesneeded)) {
+ ignore_percent += percent3[active_slot[0]];
+ return_percent = (percent3[active_slot[1]] * 100) / (101 - ignore_percent);
+ *summary_lang = language3[active_slot[1]];
+ if (percent3[active_slot[1]] < kKeepMinPercent) {*is_reliable = false;}
+
+ // Else If FIGS and X, where X (not UNK, EFIGS) is big enough,
+ // assume the FIGS is boilerplate and return X.
+ // Logically remove FIGS from percentage-text calculation
+ } else if (IsFIGS(language3[active_slot[0]]) &&
+ !IsEFIGS(language3[active_slot[1]]) &&
+ (language3[active_slot[1]] != UNKNOWN_LANGUAGE) &&
+ (percent3[active_slot[1]] >= kNonFIGSBoilerplateMinPercent) &&
+ (second_bytes >= minbytesneeded)) {
+ ignore_percent += percent3[active_slot[0]];
+ return_percent = (percent3[active_slot[1]] * 100) / (101 - ignore_percent);
+ *summary_lang = language3[active_slot[1]];
+ if (percent3[active_slot[1]] < kKeepMinPercent) {*is_reliable = false;}
+
+ // Else we are returning the first language, but want to improve its
+ // return_percent if the second language should be ignored
+ } else if ((language3[active_slot[1]] == ENGLISH) &&
+ (language3[active_slot[0]] != ENGLISH)) {
+ ignore_percent += percent3[active_slot[1]];
+ return_percent = (percent3[active_slot[0]] * 100) / (101 - ignore_percent);
+ } else if (IsFIGS(language3[active_slot[1]]) &&
+ !IsEFIGS(language3[active_slot[0]])) {
+ ignore_percent += percent3[active_slot[1]];
+ return_percent = (percent3[active_slot[0]] * 100) / (101 - ignore_percent);
+ }
+
+ // If return percent is too small (too many languages), return UNKNOWN
+ if ((return_percent < kGoodFirstMinPercent)) {
+ *summary_lang = UNKNOWN_LANGUAGE;
+ *is_reliable = false;
+ }
+
+ // If return percent is small, return language but set unreliable.
+ if ((return_percent < kGoodFirstReliableMinPercent)) {
+ *is_reliable = false;
+ }
+
+ // If ignore percent is too large, set unreliable.
+ if ((ignore_percent > kIgnoreMaxPercent)) {
+ *is_reliable = false;
+ }
+
+ // If we removed all the active languages, return UNKNOWN
+ if (slot_count == 0) {
+ *summary_lang = UNKNOWN_LANGUAGE;
+ *is_reliable = false;
+ }
+}
+
+
+
+// Result vector must be exactly three items
+Language CompactLangDetImpl::DetectLanguageSummaryV25(
+ const char* buffer,
+ int buffer_length,
+ bool is_plain_text,
+ const char* tld_hint, // "id" boosts Indonesian
+ int encoding_hint, // SJS boosts Japanese
+ Language language_hint, // ITALIAN boosts it
+ bool allow_extended_lang,
+ int flags,
+ Language plus_one,
+ Language* language3,
+ int* percent3,
+ double* normalized_score3,
+ int* text_bytes,
+ bool* is_reliable) {
+ language3[0] = UNKNOWN_LANGUAGE;
+ language3[1] = UNKNOWN_LANGUAGE;
+ language3[2] = UNKNOWN_LANGUAGE;
+ percent3[0] = 100;
+ percent3[1] = 0;
+ percent3[2] = 0;
+ normalized_score3[0] = 0.0;
+ normalized_score3[1] = 0.0;
+ normalized_score3[2] = 0.0;
+ *text_bytes = 0;
+ *is_reliable = false;
+
+ // Document totals
+ ToteWithReliability doc_tote; // Reliability = 0..100
+
+ // Vector of packed per-language boosts (just one filled in from hints)
+ uint8 lang_hint_boost[EXT_NUM_LANGUAGES + 1];
+ memset(lang_hint_boost, 0, sizeof(lang_hint_boost));
+
+ // Apply hints,if any
+ if ((tld_hint != NULL) && (tld_hint[0] != '\0')) {
+ ApplyTLDHint(lang_hint_boost, tld_hint);
+ }
+ if (encoding_hint != UNKNOWN_ENCODING) {
+ ApplyEncodingHint(lang_hint_boost, encoding_hint);
+ }
+ if (language_hint != UNKNOWN_LANGUAGE) {
+ ApplyLanguageHint(lang_hint_boost, language_hint);
+ }
+
+
+ // Four individual script totals, Latin, Han, other2, other3
+ int next_other_tote = 2;
+ int tote_num = 0;
+
+ // Four totes for up to four different scripts pending at once
+ Tote totes[4]; // [0] Latn [1] Hani [2] other [3] other
+ bool tote_seen[4] = {false, false, false, false};
+ int tote_grams[4] = {0, 0, 0, 0}; // Number in partial chunk
+ UnicodeLScript tote_script[4] =
+ {ULScript_Latin, ULScript_HanCJK, ULScript_Common, ULScript_Common};
+
+ // Loop through text spans in a single script
+ ScriptScanner ss(buffer, buffer_length, is_plain_text);
+ getone::LangSpan scriptspan;
+
+ scriptspan.text = NULL;
+ scriptspan.text_bytes = 0;
+ scriptspan.offset = 0;
+ scriptspan.script = ULScript_Common;
+ scriptspan.lang = UNKNOWN_LANGUAGE;
+
+ int total_text_bytes = 0;
+ int textlimit = FLAGS_cld_textlimit << 10; // in KB
+ if (textlimit == 0) {textlimit = 0x7fffffff;}
+
+ int advance_by = 2; // Advance 2 bytes
+ int advance_limit = textlimit >> 3; // For first 1/8 of max document
+
+ int initial_word_span = kDefaultWordSpan;
+ if (FLAGS_cld_forcewords) {
+ initial_word_span = kReallyBigWordSpan;
+ }
+
+ // Pick up chunk sizes
+ // Smoothwidth is units of quadgrams, about 2.5 chars (unigrams) each
+ // Sanity check -- force into a reasonable range
+ int chunksizequads = FLAGS_cld_smoothwidth;
+ chunksizequads = cld::minint(cld::maxint(chunksizequads, kMinChunkSizeQuads),
+ kMaxChunkSizeQuads);
+ int chunksizeunis = (chunksizequads * 5) >> 1;
+
+ // Varying short-span limit doesn't work well -- skips too much beyond 20KB
+ // int spantooshortlimit = advance_by * FLAGS_cld_smoothwidth;
+ int spantooshortlimit = kShortSpanThresh;
+
+ // For debugging only. Not thread-safe
+ prior_lang = UNKNOWN_LANGUAGE;
+ prior_unreliable = false;
+
+ // Allocate full-document prediction table for finding repeating words
+ int hash = 0;
+ int* predict_tbl = new int[kPredictionTableSize];
+ if (FlagRepeats(flags)) {
+ memset(predict_tbl, 0, kPredictionTableSize * sizeof(predict_tbl[0]));
+ }
+
+ // Loop through scriptspans accumulating number of text bytes in each language
+ while (ss.GetOneScriptSpanLower(&scriptspan)) {
+ UnicodeLScript lscript = scriptspan.script;
+
+ // Echo text if asked to
+ if (FLAGS_cld_echotext) {
+ PrintHtmlEscapedText(stderr, scriptspan.text, scriptspan.text_bytes);
+ }
+
+ // Squeeze out big chunks of text span if asked to
+ if (FlagSqueeze(flags)) {
+ // Remove repetitive or mostly-spaces chunks
+ int newlen;
+ int chunksize = 0; // Use the default
+ newlen = CheapSqueezeInplace(scriptspan.text, scriptspan.text_bytes,
+ chunksize);
+ scriptspan.text_bytes = newlen;
+ } else {
+ // Check now and then to see if we should be squeezing
+ if ((total_text_bytes >= kCheapSqueezeTestThresh) &&
+ !FlagFinish(flags) &&
+ ((getone::kMaxScriptBuffer >> 1) < scriptspan.text_bytes) &&
+ CheapSqueezeTriggerTest(scriptspan.text,
+ scriptspan.text_bytes,
+ kCheapSqueezeTestLen)) {
+ // Recursive call with big-chunk squeezing set
+ if (FLAGS_cld_html || FLAGS_dbgscore) {
+ fprintf(stderr,
+ "<br>---text_bytes[%d] Recursive(Squeeze)---<br><br>\n",
+ total_text_bytes);
+ }
+ // Deallocate full-document prediction table
+ delete[] predict_tbl;
+
+ return DetectLanguageSummaryV25(
+ buffer,
+ buffer_length,
+ is_plain_text,
+ tld_hint, // "id" boosts Indonesian
+ encoding_hint, // SJS boosts Japanese
+ language_hint, // ITALIAN boosts it
+ allow_extended_lang,
+ flags | kCLDFlagSqueeze,
+ plus_one,
+ language3,
+ percent3,
+ normalized_score3,
+ text_bytes,
+ is_reliable);
+ }
+ }
+
+ // Remove repetitive words if asked to
+ if (FlagRepeats(flags)) {
+ // Remove repetitive words
+ int newlen;
+ newlen = CheapRepWordsInplace(scriptspan.text, scriptspan.text_bytes,
+ &hash, predict_tbl);
+ scriptspan.text_bytes = newlen;
+ }
+
+ // The real scoring
+ // Accumulate directly into the document total, or accmulate in one of four
+ // chunk totals. The purpose of the multiple chunk totals is to piece
+ // together short choppy pieces of text in alternating scripts. One total is
+ // dedicated to Latin text, one to Han text, and the other two are dynamicly
+ // assigned.
+ Language onlylang = cld::kOnlyLanguagePerLScript[lscript];
+
+ if (onlylang != UNKNOWN_LANGUAGE) {
+ // This entire script run is in a single language.
+ ScoreNilgrams(&scriptspan, cld::PackLanguage(onlylang), &doc_tote,
+ lang_hint_boost, flags, plus_one);
+ } else if (cld::kScoreUniPerLScript[lscript] != 0) {
+ // This entire script run's languages can be distinguished by uni-grams
+ // Accumulate in hani_tote
+ tote_num = 1;
+ if (!tote_seen[tote_num]) {
+ tote_seen[tote_num] = true;
+ // Default language gets 1 byte
+ total_text_bytes += 1;
+ InitScriptToteLang(&totes[tote_num], lscript);
+ }
+ ScoreUnigrams(&scriptspan, &tote_grams[tote_num], chunksizeunis,
+ &totes[tote_num],
+ &doc_tote, lang_hint_boost,
+ advance_by, flags, &initial_word_span, plus_one);
+ } else {
+ // This entire script-run's languages can be distinguished by quad-grams
+ // Accumulate in latn_tote or script0/1_tote
+ tote_num = -1;
+ for (int t = 0; t < 4; ++t) {
+ if (lscript == tote_script[t]) {
+ tote_num = t;
+ break;
+ }
+ }
+ if (tote_num < 0) {
+ // Need to allocate other0/1
+ tote_num = next_other_tote;
+ next_other_tote ^= 1; // Round-robin
+ if (tote_seen[tote_num]) {
+ // Flush previous
+ ScoreChunkIntoDoc2(kToteSwitch[tote_num], advance_by,
+ tote_script[tote_num], &totes[tote_num],
+ &doc_tote, tote_grams[tote_num], lang_hint_boost);
+ totes[tote_num].Reinit();
+ }
+ tote_script[tote_num] = lscript;
+ }
+
+ if (!tote_seen[tote_num]) {
+ tote_seen[tote_num] = true;
+ // Default language gets 1 byte
+ total_text_bytes += 1;
+ InitScriptToteLang(&totes[tote_num], lscript);
+ }
+
+ // The actual accumulation, possibly with word scoring also
+ ScoreQuadgrams(&scriptspan, &tote_grams[tote_num],
+ chunksizequads,
+ &totes[tote_num],
+ &doc_tote, lang_hint_boost,
+ advance_by, flags, &initial_word_span, plus_one);
+ }
+
+ total_text_bytes += scriptspan.text_bytes;
+
+ // For long documents, do less-dense samples the further along we go.
+ // This is to keep speed sublinear in document size.
+ if (total_text_bytes > advance_limit) {
+ if (total_text_bytes > textlimit) {
+ // Don't look at rest of doc
+ if (FLAGS_cld_html || FLAGS_dbgscore) {
+ fprintf(stderr, "<br>---text_bytes[%d] textlimit %d reached---<br>",
+ total_text_bytes, textlimit);
+ }
+ break;
+ }
+ advance_by <<= 1; // Double advance bytes
+ advance_limit <<= 1; // Double limit until next change
+ spantooshortlimit <<= 1; // Double short-span size
+ if (FLAGS_cld_html || FLAGS_dbgscore) {
+ fprintf(stderr, "<br>---text_bytes[%d] advance_by doubled to %d---<br>",
+ total_text_bytes, advance_by);
+ }
+ }
+ } // End while (ss.GetOneScriptSpanLower())
+
+ // Deallocate full-document prediction table
+ delete[] predict_tbl;
+
+ // Flush pending totals
+ for (int tote_num = 0; tote_num < 4; ++tote_num) {
+ if (tote_seen[tote_num]) {
+ ScoreChunkIntoDoc2(kToteName[tote_num], advance_by,
+ tote_script[tote_num], &totes[tote_num], &doc_tote,
+ tote_grams[tote_num], lang_hint_boost);
+ }
+ }
+
+ // If extended langauges are disallowed, remove them here
+ if (!allow_extended_lang) {
+ RemoveExtendedLanguages(&doc_tote);
+ }
+
+ // Force close pairs to one or the other
+ RefineScoredClosePairs(&doc_tote);
+
+
+ // Calculate return results
+ // Find top three byte counts in tote heap
+ int reliable_percent3[3];
+
+
+ // Cannot use Add, etc. after sorting
+ doc_tote.Sort(3);
+
+ ExtractLangEtc(&doc_tote, total_text_bytes,
+ reliable_percent3, language3, percent3, normalized_score3,
+ text_bytes, is_reliable);
+
+ bool have_good_answer = false;
+ if (FlagFinish(flags)) {
+ // Force a result
+ have_good_answer = true;
+ } else if (total_text_bytes <= kShortTextThresh) {
+ // Don't recurse on short text -- we already did word scores
+ have_good_answer = true;
+ } else if (*is_reliable &&
+ (percent3[0] >= kGoodLang1Percent)) {
+ have_good_answer = true;
+ } else if (*is_reliable &&
+ ((percent3[0] + percent3[1]) >= kGoodLang1and2Percent)) {
+ have_good_answer = true;
+ }
+
+
+ if (have_good_answer) {
+ // This is the real, non-recursive return
+
+ // Move bytes for unreliable langs to another lang or UNKNOWN
+ RemoveUnreliableLanguages(&doc_tote);
+
+ // Redo the result extraction after the removal above
+ doc_tote.Sort(3);
+ ExtractLangEtc(&doc_tote, total_text_bytes,
+ reliable_percent3, language3, percent3, normalized_score3,
+ text_bytes, is_reliable);
+
+#if 0
+ // OLD code, replaced by CalcSummaryLang
+ //
+ // Suppress ignore-me text, TG_UNKNOWN_LANGUAGE if 2nd or 3rd language
+ // Force it to English if first language
+ if (language3[2] == TG_UNKNOWN_LANGUAGE) {
+ reliable_percent3[2] = 0;
+ language3[2] = UNKNOWN_LANGUAGE;
+ percent3[2] = 0;
+ } else if (language3[1] == TG_UNKNOWN_LANGUAGE) {
+ // Move up lower language
+ reliable_percent3[1] = reliable_percent3[2];
+ language3[1] = language3[2];
+ percent3[1] = percent3[2];
+ reliable_percent3[2] = 0;
+ language3[2] = UNKNOWN_LANGUAGE;
+ percent3[2] = 0;
+ } else if (language3[0] == TG_UNKNOWN_LANGUAGE) {
+ language3[0] = ENGLISH;
+ }
+
+ if (language3[0] == UNKNOWN_LANGUAGE) {
+ // Last-ditch test for some result, but it is UNKNOWN_LANGUAGE
+ // Force it to English (should not happen)
+ language3[0] = ENGLISH;
+ percent3[0] = 100;
+ *is_reliable = true;
+ }
+#endif
+
+
+#if 0
+ // Scaffolding to reveal subset sequence lang distribution across doc text
+ // Track the sequence of language fragments [result currently unused]
+ if (FLAGS_cld_html) {
+ static const int kMaxSubsetSeq = 12;
+ uint8 subseq[kMaxSubsetSeq];
+ doc_tote.ExtractSeq(kMaxSubsetSeq, subseq);
+
+ fprintf(stderr, "<br>\nSubset Sequence[%d]: ", kMaxSubsetSeq);
+ for (int i = 0; i < kMaxSubsetSeq; ++i) {
+ fprintf(stderr, "%s ", ExtLanguageCode(cld::UnpackLanguage(subseq[i])));
+ if ((i % 4) == 3) {fprintf(stderr, "&nbsp; ");}
+ }
+ fprintf(stderr, "&nbsp;&nbsp; ");
+
+ for (int i = 0; i < 3; ++i) {
+ if (language3[i] != UNKNOWN_LANGUAGE) {
+ fprintf(stderr, "%s.%d(%d%%) ",
+ ExtLanguageCode(language3[i]),
+ reliable_percent3[i],
+ percent3[i]);
+ }
+ }
+
+ fprintf(stderr, "%d B ", total_text_bytes);
+ fprintf(stderr, "<br>\n");
+ }
+ // End Scaffolding to reveal subset sequence lang distribution
+#endif
+
+ Language summary_lang;
+ CalcSummaryLang(&doc_tote, total_text_bytes,
+ reliable_percent3, language3, percent3,
+ &summary_lang, is_reliable);
+
+ if (FLAGS_cld_html) {
+ for (int i = 0; i < 3; ++i) {
+ if (language3[i] != UNKNOWN_LANGUAGE) {
+ fprintf(stderr, "%s.%d(%d%%) ",
+ ExtLanguageCode(language3[i]),
+ reliable_percent3[i],
+ percent3[i]);
+ }
+ }
+
+ fprintf(stderr, "%d B ", total_text_bytes);
+ fprintf(stderr, "= %s%c ",
+ ExtLanguageName(summary_lang), is_reliable ? ' ' : '*');
+ fprintf(stderr, "<br>\n");
+ }
+
+ return summary_lang;
+ }
+
+ // Not a good answer -- do recursive call to refine
+ if (FLAGS_cld_html || FLAGS_dbgscore) {
+ // This is what we hope to improve on in the recursive call, if any
+ PrintLangs(stderr, language3, percent3, text_bytes, is_reliable);
+ }
+
+ // For restriction to Top40 + one, the one is 1st/2nd lang that is not Top40
+ // For this purpose, we treate "Ignore" as top40
+ Language new_plus_one = UNKNOWN_LANGUAGE;
+ if (cld::kIsPackedTop40[cld::PackLanguage(language3[0])] == 0) {
+ new_plus_one = language3[0];
+ } else if (cld::kIsPackedTop40[cld::PackLanguage(language3[1])] == 0) {
+ new_plus_one = language3[1];
+ }
+
+ if (total_text_bytes < kShortTextThresh) {
+ // Short text: Recursive call with top40 and short set
+ if (FLAGS_cld_html || FLAGS_dbgscore) {
+ fprintf(stderr, "&nbsp;&nbsp;---text_bytes[%d] "
+ "Recursive(Top40/Rep/Short/Words)---<br><br>\n",
+ total_text_bytes);
+ }
+ return DetectLanguageSummaryV25(
+ buffer,
+ buffer_length,
+ is_plain_text,
+ tld_hint, // "id" boosts Indonesian
+ encoding_hint, // SJS boosts Japanese
+ language_hint, // ITALIAN boosts it
+ allow_extended_lang,
+ flags | kCLDFlagTop40 | kCLDFlagRepeats |
+ kCLDFlagShort | kCLDFlagUseWords | kCLDFlagFinish,
+ new_plus_one,
+ language3,
+ percent3,
+ normalized_score3,
+ text_bytes,
+ is_reliable);
+ }
+
+ // Longer text: Recursive call with top40 set
+ if (FLAGS_cld_html || FLAGS_dbgscore) {
+ fprintf(stderr,
+ "&nbsp;&nbsp;---text_bytes[%d] Recursive(Top40/Rep)---<br><br>\n",
+ total_text_bytes);
+ }
+ return DetectLanguageSummaryV25(
+ buffer,
+ buffer_length,
+ is_plain_text,
+ tld_hint, // "id" boosts Indonesian
+ encoding_hint, // SJS boosts Japanese
+ language_hint, // ITALIAN boosts it
+ allow_extended_lang,
+ flags | kCLDFlagTop40 | kCLDFlagRepeats |
+ kCLDFlagFinish,
+ new_plus_one,
+ language3,
+ percent3,
+ normalized_score3,
+ text_bytes,
+ is_reliable);
+} // End CompactLangDetImpl::DetectLanguageSummaryV25
Property changes on: third_party\cld\bar\toolbar\cld\i18n\encodings\compact_lang_det\compact_lang_det_impl.cc
___________________________________________________________________
Added: svn:eol-style
+ LF
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